Unifying calls to helper values

bok choy tests for persistent grades

TNL-5115: Remove sort order from Discussions in edx-platform

- Default of "desc" is all that is in use, and remains as-is.
- Discussion API keeps order_direction param, to minimize changes,
but it only accepts "desc".
- Discussion webapp simply no longer sends in the sort order.

pa11ycrawler 1.5.2

Revert "pa11ycrawler 1.5.1"

Update translations (autogenerated message)

Add font awesome loading spinner to CAPA problems

pa11ycrawler 1.5.1

AC-578 fixing link in label on logistration form

- loading spinner is automatically replaced by the content when AJAX problem_get returns

Merge release back into master

Make Robust Grades Robust Again

Update coverage version to 4.2

Don't delete question p-tag if children.

Reduce sql queries with persisted grades

As part of the Robust Grades rollout, we expect to see some DatabaseErrors in
various methods that write to the database. Since the success of this write
operation is not needed for the end-user, we just log and swallow the error.

In the future, we'll also enqueue an async task to finish the write operation
that failed.

TNL-5458
TNL-5493

TNL-5510

Change edx-django-release-util version.

Update opaque-keys and ccx-keys versions.

Merging hotfix/2016-09-13 release into master

Fix the duplicate oauth_body_hash in the outcomes request

Wrap the discussion header in a <nav aria-label="Forums">

TNL-5193

TNL-5240: Cache comment thread.

AC-581 using UXPL values for course types on dashboard