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.

Extract course run with highest grades.

Change waffle flag for enrollment throttle to switch

add script to detect dead code

Bump poll xblock version to 1.5.1 - removes warning.

[ENT-1029] edx-enterprise version bump 0.69.1

Rate limiting registration form validation end point.

This patch would ratelimit registration form validation
endpoint for anonymous user based on his/her ip.

LEARNER-3810

Revert "Switch container factory to webpack"

Add require_https to all is_safe_url calls

Change usages of is_safe_url to use new allowed_hosts instead of host

Exempt csrf on donate

Revert "OAuth2 API to call XBlock handlers"

PLAT-1746: Use Django 1.11 format_lazy instead of allow_lazy

Switch container factory to webpack

"host" parameter is deprecated and throws a warning

Remove SessionAuthenticationMiddleware from INSTALLED_APPS

Reapplies edx/edx-platform#17509

This reverts commit 0f7e2373.

Upgrade edx-ora2 to 2.1.17

Remove unused pytest markers for Django 1.11 upgrade

Remove temp django upgrade logic

It is always on now, and this is just a deprecated stub which will be
removed in Django 2.0.