Support for separate Journals frontend app

Clear cache after tests that create DarkLangConfig objects

[ENT-769] - Unlink learner from Enterprise Customer 

bump edx-sga to 0.8.3

EDUCATOR-3417: Remove flaky video test.

EDUCATOR-3418: Remove flaky completion test.

* test_render_xblock_publish_completion_is_sent_on_view

* test_video_language_menu_working

EDUCATOR-3409: Remove flaky completion test.

* test_courseware_publish_completion_is_sent_on_view

Log conditional xblock fragment resource loading

Mergeback PR from private to public.

Update recommender-xblock version number

When sending a program cert to Credentials, also send along a
calculated visible_date along with it.

LEARNER-6262

EDUCATOR-3385 fix attribute error in discussion email notification

EDUCATOR-2714

Reveal industry pathways in program details sidebar

Fix entitlement expiring on switching session.

LEARNER-6313

Merge release back to master

Change access pattern for role/permissions retrieval to address Aurora query optimizer.

This is a fix for the performance issues in EDUCATOR-3374

AWS's Aurora backend for MySQL selects the wrong index on the
django_comment_client_role_users table, leading to performance issues.
This commit replaces that join with individual requests for permissions
for each role (of which there may be several for any given user).
It's dumber SQL, but Aurora will do the right thing.