The rate limiter counts requests in a 5-minute window.  To be sure we
aren't hitting edge cases, make the future requests 6 minutes plus 1
second in the future.

The error in the test was:
```
AssertionError: The `request` argument must be an instance of `django.http.HttpRequest`, not `rest_framework.request.Request`.
```
The (controversial) incompatible change was in 3.7.4: https://github.com/encode/django-rest-framework/pull/5618

I'll look into whether there's another way to address it.

<details>
  <summary>Full error report</summary>

```
AssertionError: The `request` argument must be an instance of `django.http.HttpRequest`, not `rest_framework.request.Request`.

Stacktrace

self = <lms.djangoapps.discussion_api.tests.test_views.CommentViewSetListTest testMethod=test_profile_image_request_for_null_endorsed_by>

    def test_profile_image_request_for_null_endorsed_by(self):
        """
        Tests if 'endorsed' is True but 'endorsed_by' is null, the api does not crash.
        This is the case for some old/stale data in prod/stage environments.
        """
        self.register_get_user_response(self.user)
        thread = self.make_minimal_cs_thread({
            "thread_type": "question",
            "endorsed_responses": [make_minimal_cs_comment({
                "id": "endorsed_comment",
                "user_id": self.user.id,
                "username": self.user.username,
                "endorsed": True,
            })],
            "non_endorsed_resp_total": 0,
        })
        self.register_get_thread_response(thread)
        self.create_profile_image(self.user, get_profile_image_storage())

        response = self.client.get(self.url, {
            "thread_id": thread["id"],
            "endorsed": True,
>           "requested_fields": "profile_image",
        })

lms/djangoapps/discussion_api/tests/test_views.py:1446:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
../venvs/edxapp/local/lib/python2.7/site-packages/rest_framework/test.py:291: in get
    response = super(APIClient, self).get(path, data=data, **extra)
../venvs/edxapp/local/lib/python2.7/site-packages/rest_framework/test.py:208: in get
    return self.generic('GET', path, **r)
../venvs/edxapp/local/lib/python2.7/site-packages/rest_framework/test.py:237: in generic
    method, path, data, content_type, secure, **extra)
../venvs/edxapp/local/lib/python2.7/site-packages/django/test/client.py:416: in generic
    return self.request(**r)
../venvs/edxapp/local/lib/python2.7/site-packages/rest_framework/test.py:288: in request
    return super(APIClient, self).request(**kwargs)
../venvs/edxapp/local/lib/python2.7/site-packages/rest_framework/test.py:240: in request
    request = super(APIRequestFactory, self).request(**kwargs)
../venvs/edxapp/local/lib/python2.7/site-packages/django/test/client.py:501: in request
    six.reraise(*exc_info)
../venvs/edxapp/local/lib/python2.7/site-packages/django/core/handlers/exception.py:41: in inner
    response = get_response(request)
../venvs/edxapp/local/lib/python2.7/site-packages/django/core/handlers/base.py:249: in _legacy_get_response
    response = self._get_response(request)
../venvs/edxapp/local/lib/python2.7/site-packages/django/core/handlers/base.py:187: in _get_response
    response = self.process_exception_by_middleware(e, request)
../venvs/edxapp/local/lib/python2.7/site-packages/django/core/handlers/base.py:185: in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
../venvs/edxapp/local/lib/python2.7/site-packages/django/utils/decorators.py:185: in inner
    return func(*args, **kwargs)
../venvs/edxapp/local/lib/python2.7/site-packages/django/views/decorators/csrf.py:58: in wrapped_view
    return view_func(*args, **kwargs)
../venvs/edxapp/local/lib/python2.7/site-packages/rest_framework/viewsets.py:95: in view
    return self.dispatch(request, *args, **kwargs)
../venvs/edxapp/local/lib/python2.7/site-packages/rest_framework/views.py:494: in dispatch
    response = self.handle_exception(exc)
../venvs/edxapp/local/lib/python2.7/site-packages/rest_framework/views.py:491: in dispatch
    response = handler(request, *args, **kwargs)
lms/djangoapps/discussion_api/views.py:505: in list
    form.cleaned_data["requested_fields"],
lms/djangoapps/discussion_api/api.py:659: in get_comment_list
    results = _serialize_discussion_entities(request, context, responses, requested_fields, DiscussionEntity.comment)
lms/djangoapps/discussion_api/api.py:468: in _serialize_discussion_entities
    request, results, usernames, discussion_entity_type, include_profile_image
lms/djangoapps/discussion_api/api.py:413: in _add_additional_response_fields
    username_profile_dict = _get_user_profile_dict(request, usernames=','.join(usernames))
lms/djangoapps/discussion_api/api.py:350: in _get_user_profile_dict
    user_profile_details = AccountViewSet.as_view({'get': 'list'})(request).data
../venvs/edxapp/local/lib/python2.7/site-packages/django/views/decorators/csrf.py:58: in wrapped_view
    return view_func(*args, **kwargs)
../venvs/edxapp/local/lib/python2.7/site-packages/rest_framework/viewsets.py:95: in view
    return self.dispatch(request, *args, **kwargs)
../venvs/edxapp/local/lib/python2.7/site-packages/rest_framework/views.py:477: in dispatch
    request = self.initialize_request(request, *args, **kwargs)
../venvs/edxapp/local/lib/python2.7/site-packages/rest_framework/viewsets.py:118: in initialize_request
    request = super(ViewSetMixin, self).initialize_request(request, *args, **kwargs)
../venvs/edxapp/local/lib/python2.7/site-packages/rest_framework/views.py:381: in initialize_request
    parser_context=parser_context
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

self = <rest_framework.request.Request object at 0x7f597c773890>
request = <rest_framework.request.Request object at 0x7f597fa20f90>
parsers = [<openedx.core.lib.api.parsers.MergePatchParser object at 0x7f59810c32d0>]
authenticators = [<edx_rest_framework_extensions.auth.jwt.authentication.JwtAuthentication object at 0x7f597c713690>, <openedx.core.lib...rest_framework_extensions.auth.session.authentication.SessionAuthenticationAllowInactiveUser object at 0x7f597c773390>]
negotiator = <rest_framework.negotiation.DefaultContentNegotiation object at 0x7f597fa20410>
parser_context = {'args': (), 'kwargs': {}, 'view': <openedx.core.djangoapps.user_api.accounts.views.AccountViewSet object at 0x7f597c7846d0>}

    def __init__(self, request, parsers=None, authenticators=None,
                 negotiator=None, parser_context=None):
        assert isinstance(request, HttpRequest), (
            'The `request` argument must be an instance of '
            '`django.http.HttpRequest`, not `{}.{}`.'
>           .format(request.__class__.__module__, request.__class__.__name__)
        )
E       AssertionError: The `request` argument must be an instance of `django.http.HttpRequest`, not `rest_framework.request.Request`.

../venvs/edxapp/local/lib/python2.7/site-packages/rest_framework/request.py:159: AssertionError
```
</details>

In production, we use UTC as the time zone.  DRF 3.7.7 now puts all
times in the currently set timezone where it used to use UTC.  By
setting TIME_ZONE to UTC, we keep the same results we used to get.

In a few places, we had to change the expected test results to be UTC.

Because we added drf-yasg and pinned djangorestframework

* Install drf-yasg

* Add drf-yasg settings and urls

* Pin drf to make drf-yasg work

* Adjust config-models version to be compatible

* Remove django-rest-swagger (the old way)

Adding simple history to track grade changes. Educator-4347

Potential fix for review rules - EDUCATOR-4262

Unpin edx-enterprise and edx-drf-extensions

Add a script requirements file to upgrade automation.

Python Requirements Update

Change button text for creating account

added migration

Adding simple history to track grade changes. Educator-4347
Adding migration file

Adding simple history to track grade changes. Educator-4347
Adding migration file

Adding simple history to track grade changes. Educator-4347
Adding migration file

Re-adding lms.djangoapps reference to see if it will fix the build issues

Re-adding lms.djangoapps reference to see if it will fix the build issues

Add in messaging for 403 errors on about pages & update error color for a11y

The xblock counting script had a requirements file that was not
previously being tracked and had an out of date version of requests.
Add it to the `upgrade` make target so that it stays up to date.

Update dependency @edx/edx-bootstrap to v1.0.4

The output that renovate generates is different from what the version of
npm we're using generates.

Version 2.1.1 on NPM is not exactly the thing we use.

add discount banner to track selection and discount price to upgrade button

Update dependency moment to v2.19.3 [SECURITY]

It looks like the package maintainers had a v2.1.1 that was on github
but then released a different 2.1.1 to NPM.  When renovate(upgrade
automation) tries to make any changes, it updates the lockfile to point
to the NPM one which currently breaks tests.

Pinning to the correct version in the package.json so that we can get
other things upgraded.

- Moved jasmin-jquery back to pointing at git.  The version on NPM is
not the same because they made more changes to 2.1.1 before releasing it
to NPM.

- Run `npm install` locally because it produces slightly different
output than renovate which causes the quality tests to fail.

Update dependency react-dom to v16.1.2 [SECURITY]

* Add IdentityServer3 Backend

This adds a backend for users who want to use IdentityServer3 as their
SSO provider. It can be used with the OAuth2ProviderConfig in django
admin to point to an external provider.

BB-1132 Decrease NAME_MIN_LENGTH to 1.

Catch other changes to the lock file that should have been made.