Use ddt for shib tests
Remove test cleanups

Since `ddt` should make them unnecessary
Add _get_request_value to safely access request.REQUEST for browser events.
Merge pull request #5111 from edx/shib-tests-ddt

Use ddt for shib tests
Merge pull request #5478 from edx/brian/fix-user-track

Add _get_request_value to safely access request.REQUEST for browser events.
Overview and configuration for cohorts feature
Merge pull request #5327 from edx/ahodges/doc/cohorts

Ahodges/doc/cohorts
Creative Commons Licensing for edX LMS and Studio
A little code cleanup
Fix rebase syntax errors
Remove typo and added import
Cleanup, docstrings and style improvements
Style improvements to match PEP8 and Pylint standards
Added name to AUTHORS file
Fixed a bunch of failing tests added a FEATURE flag to the backend
Moved feature flag check out of init to fix failing tests
Added feature flags to video context and fixed cloning of courses
Creative Commons Licensing for edX LMS and Studio
A little code cleanup
Cleanup, docstrings and style improvements