Merge pull request #120 from Pearson-Advance/vue/PADV-1134

PADV 1134 - Global staff and superusers should have access to the CCX gradebook.

lms/djangoapps/grades/rest_api/v1/gradebook_views.py

@@ -230,6 +230,7 @@ def _wrapper_view(self, request, course_id, *args, **kwargs):
             user_has_gradebook_access = any([
                 CourseStaffRole(course_key).has_user(request.user),
                 CourseInstructorRole(course_key).has_user(request.user),
+                request.user.is_staff,
             ])
             if is_ccx_course(course_key) and user_has_gradebook_access:
                 return view(self, request, course_key, *args, **kwargs)