[MICROBA-1466]

This is intended for use in the Studio OAuth transition (ARCHBOM-1887) but
may be useful in the future as well.

Reverting because of errors seen in proctoring. The error from splunk:

 File "/edx/app/edxapp/venvs/edxapp/lib/python3.8/site-packages/edx_proctoring/views.py", line 590, in get
    data['onboarding_release_date'] = effective_start.isoformat()
AttributeError: 'NoneType' object has no attribute 'isoformat'

The effective date is coming from learning_sequences, which ultimately
comes from edx-when.

* feat!: Add data model for course app API
The current course apps API makes individual queries to determine if a course app is enabled, which can be inefficient. With this change we now have a Django model that contains this information, allowing us to make bulk queries about all the course apps for a course in the API.
It also adds a new signal handler that initialises the status of all course apps in a course on course publish.

* Use celery tasks and a management commands to make cache async

* Review feedback

* update log messages
use separate celery task for each course task

- moved send_activation_email to user_authn app
- registered task under both new and old name
- exposed the old name for task invocation

VAN-417

* fix: [AA-950] Add unit test to verify segment called correctly

Add positive and negative test
Moved flag update to same block as segment
Moved WaffleFlag check to can_show_streak_discount_coupon for consistency

* fix: [AA-950] Fix gating feature from WaffleFlag

Streak Discount was being offered for non-verified courses

course outline, which don't need block dates below the subsection level of a course.
Pass the course's published version to all the appropriate places where edx-when's API
is called - to allow edx-when to more efficiently cache queried/processed results.

TNL-8061

* Add STUDENT_REGISTRATION_COMPLETED event after the user's registration
* Add SESSION_LOGIN_COMPLETED event after the user's login session
* Add COURSE_ENROLLMENT_CREATED event after the user's enrollment creation

Replacing the streak_celebration.discount_experiment_AA759 Waffle flag with
courseware.streak_discount_enabled CourseWaffleFlag

https://openedx.atlassian.net/browse/AA-950



Co-authored-by: cdeery <cdeery@edx.edu>

* feat! Modify DiscussionsConfiguration to allow programs

* feat: add model for program discussions configuration

Offers blockstore-based content through content libraries acting as an
LTI 1.3 tool:

- Content Library support LTI 1.3 launches offering blockstore-based
  content through resource links.

- Content Library support LTI 1.3. AGS, allowing gradebook updates from
  graded assignments.

* feat: [AA-950] Productize Streak Discount

- Change STREAK_DISCOUNT_EXPERIMENT_FLAG to STREAK_DISCOUNT_FLAG
- Remove references to "experiment" and ticket AA-759
- Made flag names more consistent
- Move segment event from get_bucket  to streak calculation
- Streak discount event edx.bi.course.streak_discount_enabled is sent when celebrations are calculated
- Convert LegacyWaffleFlags to WaffleFlags

Co-authored-by: cdeery <cdeery@edx.edu>

In the PR https://github.com/edx/edx-platform/pull/10659 the outer_atomic decorator/context manager was created to prevent nested atomic blocks. This method received a boolean parameter read_committed to enforce read-committed MySQL isolation level. From Django 2, the default isolation level Django sets is read-committed, so the aforementioned parameter for outer_atomic can be removed

CookieNameChange allowed the use of the expand-contract pattern for
cookies, but the suggested procedure assumed an instantaneous change on
the server side. Without that, there would be a brief window of time where
servers that had received the newer config would be writing cookies that
the servers with old config would not be able to understand.

However, the mechanism can be made seamless by using it *twice* in
succession, with the first usage in a "no-op" configuration. This allows
all the servers to become aware of the new name without using it. The
second change flips the configuration and changes the official name of the
cookie, and during that window both sets of servers are able to understand
both sets of names, even though they're sending a mix of names. This can
then be followed by the usual cleanup.

This change is done so the profile is automatically created for tests users

- Removed manage_user and manage_group commands and their unit tests from edx-platform and added then to edx-django-utils.
- Modified User.post_save signal to ensure the user profile is created when manage_user management command is run to create a user.
- Added edx-django-utils to INSTALLED_APPS for LMS and Studio.
- Moved generate_password from openedx.core.djangoapps.user_authn.utils to edx_django_utils.user along with its unit test.

Description: Adds a new middleware to help with cookie name changes. It uses the idea of expand and contract, where after we've changed the name, the middleware allows up to accept either a cookie with new name (given higher priority when both are present) or cookie with old name.

This is also helpful when changing domain of a cookie.

impacts: developers, users(anyone that has cookies)
Change depends on django setting changes. See CookieNameChange middleware for more info.

* fix: upgrade py2neo from 3.1.2 to 2021.1.5

The dump_to_neo4j management command has not been working
since the upgrade to python 3.8. The latest version of
python that py2neo 3.1.2 states support for is python 3.5,
so this isn't surprising.

The earliest non-prerelease version of py2neo that supports
python 3.8 is 2020.x (skipping the 4.x and 5.x series). Since
we're going as far as a 2020.x, we may as well upgrade all the
way to the newest series, 2021.x. This commit does that upgrade,
as well as a handful of minor code modifications in order
to handle breaking changes that have been made to the py2neo
API, and some unrelated pin bumps as the result of
'make upgrade'.

This will also require an upgrade of Coursegraph's Neo4j
version from 3.2.x to 3.5.x.

TNL-8386

Added activation key to the registration event to be used by braze.
Specifically it will be used by activation reminder emails.

VAN-693

* Add unsubscribe_token uuid field to CourseGoal model
* Add endpoint to unsubcribe from just a token (no login needed)
* Add admin page for the course_goals djangoapp
* Add get_course_overview_or_404 utility method
* Clean up URL handling in course_home_api

AA-907

[MICROBA-1282]

To help with future errors sending grades to Credentials I am adding
additional data to the log message.

Credentials needs the course certificate date override data in a
slightly different format than we were passing it before. Fix!

Add a README to the coursegraph app, including:

    description/purpose,
    vague deployment instructions,
    devstack instructions,
    example queries, and
    link to the query archive on the wiki.

The proctored exam settings link now directs to a new modal view, rather
than the old exam settings page.

When sending a GeneratedCertificate to Credentials, send the associated
CertificateDateOverride (if there is one), or else None. This
will be triggered after any save of a GeneratedCertificate, and after
any save or deletion of a single CertificateDateOverride.

Credentials will eventually store its own copy of this date override, or
edit or remove exiting date overrides.

The functionality is exposed by (a.) A RESTful API, and (b.) A
management command. Both are added to Content Libraries V2. They allow
block importing from a local modulestore instance. Additionally, the
command line supports importing blocks from a remote platform instance
through API calls.

Additionally, fixes were added to parts of the system where needed to
properly export blocks to Content Libraries.

* refactor: Merge the openedx certs app with lms one

Move the certs API from openedx into the lms certificates app.
Functionally, this is a no-op. Cleanup will happen in a subsequent
commit. This is simply a move.

Beta testers can’t earn course certificates, so they should not see a “Request Certificate” button or other info describing how they can earn a cert.

MICROBA-992