fix: remove modulestore init to avoid pymongo deadlocks (#825) #237

Job	Run time
collect-and-verify (3.8, 3.2)	5m 7s
gh-hosted-python-3.8,django-3.2,lms-1	12m 48s
gh-hosted-python-3.8,django-3.2,lms-2	8m 41s
gh-hosted-python-3.8,django-3.2,lms-3	17m 5s
gh-hosted-python-3.8,django-3.2,lms-4	15m 43s
gh-hosted-python-3.8,django-3.2,lms-5	10m 1s
gh-hosted-python-3.8,django-3.2,lms-6	13m 52s
gh-hosted-python-3.8,django-3.2,openedx-1	13m 4s
gh-hosted-python-3.8,django-3.2,openedx-2	13m 38s
gh-hosted-python-3.8,django-3.2,openedx-3	9m 31s
gh-hosted-python-3.8,django-3.2,openedx-4	5m 51s
gh-hosted-python-3.8,django-3.2,cms-1	5m 7s
gh-hosted-python-3.8,django-3.2,cms-2	16m 19s
gh-hosted-python-3.8,django-3.2,common-1	9m 50s
gh-hosted-python-3.8,django-3.2,common-2	11m 6s
gh-hosted-python-3.8,django-3.2,common-3	6m 2s
	2h 53m 45s

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