Merge pull request #6123 from mitocw/bdero/move-course-role-check-to-student

cms/djangoapps/contentstore/tests/test_clone_course.py

cms/djangoapps/contentstore/tests/test_permissions.py

cms/djangoapps/contentstore/views/access.py

cms/djangoapps/contentstore/views/assets.py

cms/djangoapps/contentstore/views/checklist.py

cms/djangoapps/contentstore/views/component.py

cms/djangoapps/contentstore/views/course.py

cms/djangoapps/contentstore/views/export_git.py

cms/djangoapps/contentstore/views/import_export.py

cms/djangoapps/contentstore/views/item.py

cms/djangoapps/contentstore/views/tabs.py

cms/djangoapps/contentstore/views/tests/test_course_index.py

cms/djangoapps/contentstore/views/transcripts_ajax.py

cms/djangoapps/contentstore/views/user.py

common/djangoapps/student/auth.py