[MICROBA-1178] * Remove use of modulestore in `../certificates/generation.py`. * Remove use of modulestore in `../certificates/views/support.py`. * Remove use of modulestore in `../certificates/views/xqueue.py`.
[MICROBA-1178] * Remove use of modulestore in `../certificates/generation.py`. * Remove use of modulestore in `../certificates/views/support.py`. * Remove use of modulestore in `../certificates/views/xqueue.py`.