LMS-11137 Course Action State Django models.
clone_course: Add fields parameter to support new display_name.
LMS-11016 Studio server-side for course_listing and course_rerun.

Conflicts:
	cms/djangoapps/contentstore/tests/test_course_listing.py
Fixup: Studio server-side - review comments.
Merge pull request #4574 from edx/reruns/cms-server-side

Reruns/cms server side LMS-11016