Part of the notifier service deprecation (DEPR-106).

Also removed pdfminer from the package uninstall list, since we no longer install the package it conflicts with either.

ENT-3116: Bumps edx-enterprise to 3.9.10

Update the celery startup code to more closely match the docs.  We believe some of these imports are causeing circulare
dependencies that are causing race conditions in task discovery.  Since all django apps should be loaded using the
django fixup in celery 4, we shouldn't need these other overrides.

https://github.com/celery/celery/blob/v4.4.7/celery/fixups/django.py
https://docs.celeryproject.org/en/v4.4.7/django/first-steps-with-django.html#using-celery-with-django

remove the constraint on edx-sga

ENT-3522: Upgraded edx-enterprise version to 3.9.9

management command

AA-393: Add additional logging to CourseNextSectionUpdate

We have some helpful exception messages, but then we swallow them
and only log a generic message. Now we will log both!

Passing in the INSTALLED_APPS lambda seems to result in some tasks for certain apps
like instructor_task and bulk_email to not get discovered properly.

add constraint for edx-search<2.0.0

constraining edx-search because 2.0.0 requires
ES7 upgrade work to be complete.

fix update assets

Add ability to manually fail instructor tasks in batches.

When an InstructorTask is stuck in QUEUING (say if there was a
problem with celery), the support team needs to manually intervene
and mark the task as "FAILED" so that new tasks of that type can
be created for that course. This is usually done one at a time,
but sometimes a bug or outage might cause many tasks to fail at
once, making recovery extremely cumbersome. This commit adds the
ability to do this process in batches.

An xmodule file that is loaded during update_assets
without settings was referring to the FEATURES setting
without checking if it existed.

* Import instructor tasks explicitly on workers.

Importing them via app config leads to an dependency chain nightmare as lots of other apps get pulled into the startup
and are not configured in situations like testing the common and lib unit tests.  This should register tasks to the celery
workers without messing with the startup dependency chains of the LMS, CMS and test setup.

update logic to store learner's enterprise customer info in request session

AA-197: Provide cert upgrade info to learning MFE

user is authenticated. This is needed to avoid storing `None` as
enterprise customer info in request session.

Add Executive Education course mode

Deprecate COURSE_OUTLINE_PAGE_FLAG and UNIFIED_COURSE_TAB_FLAG

Specifically, pass the MFE the audit access expiration date and
let it know when the upgrade deadline has passed, by not passing
any verified mode information along.

These flags are deprecated in favor or the DISABLE_* equivalent.
This allows us to get rid of the DefaultTrueWaffleNamespace class.

Use AppConfig in instuctor_task app to ensure tasks are discovered

This fixes an issue where instructor_task Celery tasks were not being
auto-discovered, thus leaving them unregistered and unable to be
completed by our Celery workers.

TNL-7652

bump edx-enterprise version number

This was originally intended as a placeholder to remind us to
optimize the data model for sequence metadata API calls (say
by adding those fields to the CourseOverview model itself).
Logging a quarter million messages a day is overkill for this
purpose, and we will be doing another pass at the performance of
this code in the coming weeks/months.

Adds forgot password functionality for secondary email.

VAN-18

[MICROBA-676]