Bump edx-enterprise to 0.54.1.

Remove mustache from monitoring

Update single support form

LEARNER-3288

Skip completion of non-default scorable blocks.

If a scorable block either has a custom completion strategy, or is
marked as excluded from completion, don't record a completion when its
score is updated.

Complete default blocks

ENT-742 Upgrade edx-enterprise to include new enrollment api endpoint

* Vertical marks blocks completed when viewed.
* Functionality is hidden behind a waffle switch
* Submissions from front-end are limited to known-incomplete blocks
* Upgrades xblock to version 1.1.1
* Related future requirements listed in TODO tagged with EDUCATOR-1778
  and relevant opencraft OC-* ticket IDs.

OC-3088

WIP: Decaffeinate Test Files (Part 2)

Small fixes to support Okta SSO.

Add recover password endpoint

Convert mongo read_preference setting at a lower level.

Update edx-enterprise package to 0.53.19.

Merge remote-tracking branch 'upstream/master' into proversity/add-recover-password-endpoint [ci skip]

Pacing/highlights setting ui for courses

ENT-740: edx-enterprise version upgrade to 0.53.18

added redis version

Merge remote-tracking branch 'upstream/master' into proversity/add-recover-password-endpoint [ci skip]

fixup! trying to "fix" underscore syntax error

add cancel modal test

Fix quality issues.

Apply Nimisha's suggestions for my quality fixes.

Skip test_drop_unit_in_collapsed_subsection

Fix quality error

Updated course_has_highlights and get_week_highlights. Methods ensure that a course has highlights_enabled_for_messaging

Responded to Nimisha's review feedback.

Educator 1560 - Clean up labelling in the Discussion Add Post form

Show current tab even in high contrast mode

Fix focus loss when bookmarking a page in IE

Merge remote-tracking branch 'upstream/master' into proversity/add-recover-password-endpoint [ci skip]

Add `PersistentSubsectionGradeOverride` table in django admin

Add more ssencrypt tests

EDUCATOR-1624

Fix instructors ordering on program marketing page

Fixes to common/openedx tests that reference apps CMS doesn't use

Tag LMS Unit 1 tests that fail in Django 1.11

Tag LMS Unit 2 tests that fail in Django 1.11

VAL version bump