This adds a graded icon for LTI units. This was meant to go into
a recent commit, but I only updated github.in not the txt requirement
files.

AA-75

Update some really out of date docs for settings.

Show graded icons in more places

fix(i18n): update translations

Upon invalidating course certificate, revoke related program certificates
as well.

PROD-1271

Fix discussion template for translations.

A parsing error was causing underscore template
not to get processed during message
extractions and to be available on transifex.

PROD-1504

Fix docstring of retrieve_last_sitewide_block_completed

In the course outline, if a subsection has any graded content,
show a graded icon (the pencil icon).

Also, show the graded icon for LTI xmodule units (xblocks is a
different repo, but will get same treatment).

AA-75

Short Circuit Digest preferences call on Discussion Home Page

We don't run into this case anymore so remove it.

[PROD-999] - Fixing root cause of flaky JS test for discussions.

This was added in here as a shim to catch places that were still using
the old version of these models that had an attribute called course_id
instead of the `course` foreign key.  After monitoring production for
two weeks, we can be pretty confident that we've caught most places that
do this.  Removing this code since it should no longer be needed.

* fix old migrations
* fix a test
* fix enable-migrations cmd argument
* enhance verbose logging to log migrations
* update testing doc with help

Squash third_party_auth migrations

Upgrade edx-enterprise to 3.1.3

ARCHBOM-1139: We were seeing about 150 queries to the django_site table
and over 200 to memcached just to load the login page. A lot of these
are via mako template rendering, but there are other sources, and this
will hopefully nip it in the bud.

Co-authored-by: Claudiu Ion <ioncld97@gmail.com>

Adds settings for celery task auto discovery

* Commits:
  Get upgrade offer banner HTML in courseware API

for use in the Learning MFE.

Don't explicitly set the email backend in production.py

We shouldn't be explicitly setting this here. It's already set in all of
our override files and not everyone who wants to use production.py wants
to use SES so we shouldn't hardcode it here.

Also move the other settings to above the config loading so that all
config can be overridden by the config file.

There was a missing migration from the original squash.