Split/paver LMS-11211

Performance improvements to split mongo and old-mongo, based on import/export tests.

Only format test assertion messages when they are needed (they are a performance hit when testing large courses)

LMS: edX-centric  New Footer Style/Markup clean-up

Flowerhack/third party stats

Split-mongo block uniqueness constraint [LMS-11364]

Conflicts:
	common/djangoapps/student/views.py

Merge pull request #4329 from edx/waheed/lms6492-fix-404-when-users-last-visted-subsection-unpublished

Fixed 404 on courseware when users last visited subsection becomes unpublished.

Enable third party auth in LMS acceptance tests

Make split_mongo assert block identity uniqueness only over (block_type, block_id) tuples [LMS-11364]

LMS-6492

Calculate has_changes only Section/Subsection only on Outline page

show video controls for all youtube videos

TNL-184

TE-468 JS test improvement: test for attributes specifically

Ensure LMS passes correct group_id when querying content

This test is failing in a different test environment (Solano) because
the built html has reversed the order of the width and height attributes
from what we are expecting. This change focuses the assertion to the
pieces that are important (as noted in the unchanged comment above
the assertion).

make the 'ENABLE_THIRD_PARTY_AUTH' feature flag be microsite aware

Update db cache