'Override because mongo queries are higher for this
particular test. This has not been investigated exhaustively
as mongo is no longer used much, and removing user_partitions
from inheritance fixes the problem.
# The 9 mongoDB calls include calls for
# Old Mongo:
#   (1) fill_in_run
#   (2) get_course in get_course_with_access
#   (3) get_item for HTML block in get_module_by_usage_id
#   (4) get_parent when loading HTML block
#   (5)-(8) calls related to the inherited user_partitions field.
#   (9) edx_notes descriptor call to get_course'

def get_success_enrolled_staff_mongo_count(self):

    return 9
