Doing modulestore lookups is expensive, so commit 695b0362 created a
course_publish listener that would materialize the discussion ID to
XBlock usage key mapping into the CourseDiscussionSettings model.

However, the signal wasn't hooked up to the Studio process, so that
async task was never called. When hooking it up, I also discovered that
bok choy tests related to partitioning were failing because of a race
condition where multiple processes are overwriting the discussion
settings. To make sure this wasn't an issue, I moved the mapping to
its own table.

This is part of ARCH-111, and the overall Course Structures API
deprecation.

LEARNER-4869

Signed-off-by: Tomasz Gargas <tomasz@opencraft.com>

This reverts commit b541dfa3.

This reverts commit a1359535, reversing
changes made to 68d5fe89.

Introduce a course_tool plugin entry point and migrate the updates, bookmarks and reviews tools into plugins.

This reverts commit 1224e341. I've also added
NotImplementedPartitionScheme, which allows deprecated partition types to have
a valid entry point despite being unusable.

TNL-6675

Add comment explaining why we can't have a separate transformer.

TNL-6674

This reverts commit 83f2be49, reversing
changes made to 01ed1742.

This is unused, and will no longer be supported on edx.org. Also adds a
DeprecatedModel utility class.

TNL-6126

https://openedx.atlassian.net/browse/TNL-5008

This reverts commit 4e65b1f1.

* Automatically create user partitions on course publish for each ICRV checkpoint.
* Disable partitions for ICRV checkpoints that have been deleted.
* Skip partitions that have been disabled when checking access.
* Add verification access control UI to visibility settings.
* Add verification access control UI to sequential and vertical settings.
* Add partition scheme for verification partition groups.
* Cache information used by verification partition scheme and invalidate the cache on update.
* Add location parameter to UserPartition so the partition scheme can find the associated checkpoint.
* Refactor GroupConfiguration to allow multiple user partitions.
* Add special messaging to ICRV for students in the honor track.

Authors: Zubair Arbi, Awais Qureshi, Aamir Khan, Will Daly

This reverts commit 1a3f0958.

'distribute' is the ancestor of 'setuptools', and many packages require
setuptools to be installed.

Upgrade of MySQL-python from 1.2.4 to 1.2.5 is required because of an
incompatibility with setuptools>0.7.

TNL-2321

TNL-1939