EDUCATOR-565 | Add POLICY_CHANGE_GRADES_ROUTING_KEY, fix errors in compute_all_grades_for_course circuitry.

Remove unneeded mustache references.

EDUCATOR-341

RET: Cleanup Planning Prompts experimental code

upgrade edx-django-release-util to 0.3.1

Merge pull request #15522 from edx/adeel/LEARNER-1188_Setting_connection_timeout_value_for_sailthru_api_call

Increased timeout value for sailthru api call.

Upgrade version of milestones.

LEARNER-1186

[WIP] Add django management command to create course from json

Handle anonymous and unenrolled users on the new course home page

LEARNER-1696

Remove django-mako requirement

Add chromeless class to the wrapper when in chromeless mode.

Deprecate lettuce in testing.rst document

Don't allow any user to create courses by default

* Change settings default
* Set `ENABLE_CREATOR_GROUP` to False for devstack
* Set `ENABLE_CREATOR_GROUP` to False for tests

In f095c5fe it was decided to enable
anyone to make courses in Studio by default in order to make things
easier in dev environments. This was before the code was open source.
This default is likely in effect for many Open edX instances, but almost
no one would want this setting outside of development.

EDUCATOR-773

Add group_moderator role

Limit libraries as well if course listing is limited

Update configuration to translate jsx files

EDUCATOR-823

Updated confinguration of webpack and translation tools to work with jsx files

EDUCATOR-823

changes to webpack config

Fixed space issue

LEARNER-1787 Update the admin table to allow the insert of course cert settings

edx-val version bump from 0.16 to 0.17

Fix inline discussions to use cached static assets.

ADD LMS_BASE and CMS_BASE to devstack_docker config files

Yro/Certificate Signal on Learner Track Upgrade

In production environments, the DiscussionXBlock was generating CSS and
JS asset URLs that pointed to the unminified versions of those bundled
assets. Due to our nginx rules, this would cause the assets to be
served without the long expiration times, forcing the user's browser to
constantly refetch these assets while browsing a course.

[PERF-431]

Ensure User model is unregistered before registering with Django admin