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
When configured, set an additional cookie with the CSRF
token for use by subdomains.
The cookie can have a different name than the default
CSRF cookie, preventing conflicts between cookies
from different domains (e.g. ".edx.org", "courses.edx.org",
and "edge.edx.org").
The new cookie is included only on the enrollment API
views so that the scope of this change is limited
to the end-points that require cross-domain POST requests.
JIRA: TNL-710
IMPORTANT: this commit converts the course_groups
package to using migrations. When deploying to an
existing openedx instance, migration 0001 may fail
with an error indicating that the CourseUserGroup
table already exists. If this happens, running
the 0001 migration first, with the --fake option,
is recommended. After performing this step,
remaining migrations should work as expected.
