Seems like the Edit/QA links in LMS are triggered by a ENABLE_LMS_MIGRATION feature flag. So when running as mongo-backed, set that to False
add comment as to why we are turning off this feature flag
Merge pull request #388 from edx/fix/cdodge/dont-display-github-links-in-mongo-lms

[STUD-431] Seems like the Edit/QA links in LMS are triggered by a ENABLE_LMS_MIGRAT...