This is required so that an a video module exported by one Open edX
deployment and imported by another will work correctly if it contains an
edx_video_id but does not populate other URL fields.

JIRA: MA-110

block conversion.

- added entrance exam check on course info
- staff can by pass gating and added tests
- refined gating logic
- changes after rebasing with Asad's branch
- check ENTRANCE_EXAMS feature is enabled
- updated test to reflect new logic
- catering anonymous user in entrance exam permission
- fixed broken tests
- change after feedback on 16/3
- fix for a broken test
- created new entrance_exams module
- fixed quality error and improved test coverage
- put get_required_content back in milestones helper
- Refactored entrance exams logic
- Refactored tabs logic
- Fixed broken unit test
- changes after feedback from dan-f on 3/27
- removed unnecessary user.is_anonymous check
- Addressed PR feedback
- Addressed commit-specific feedback
- Rework guard clauses
- Add coverage for course info case

Conflicts:
	common/lib/xmodule/xmodule/xml_module.py

MA-77 Automatically adds the course id to the videos in VAL
when a course is rerun.

MA-169 Mobile api now calls for mobile_low (default), mobile_high,
 and youtube profiles instead of only mobile_low.

Add querystring param "course_mode" to the login/registration
page so the user can skip track selection.

This supports upcoming changes to the course details page
that allow the user to choose the track when clicking
"enroll", which will replace the functionality of the track
selection page.

This is needed for courses that license video content where the license
allows only for viewing on the web, not on mobile apps.

JIRA: MA-307

This makes these files importable, and puts them into the new best guess
as to where files should live.

do the ORG filtering as part of the mongo query. Also, don't trigger metadata inheritence calculations when just trying to load 'about' information, which is not tied into the course tree anyhow (i.e. no parent/child relationship)

Clean up docstrings for gen cert POST.

TNL-1256

TNL-1258

course cohort settings only once.

TNL-1258

TNL-1258

Move `Cohorts` section after `Membership` section

TNL-1268

The course info page was getting-or-creating
a course enrollment with is_active=0.  This commit
changes the operation to a "get" so that extra
enrollment records are not created.

This functionality is activated by adding a SKU to a non-honor course mode. When the feature is activated, verified orders will be created by the E-Commerce Service instead of LMS. After payment, the E-Commerce Service will also create the enrollment.

If a user is already enrolled in a course, the API is bypassed and a 409 status is returned.

The string "</script>" in JSON data would end the script element we're
embedding the data in.  To make sure the data doesn't disrupt the
script, we escape the slash as \/ .