fix: fixing some broken dependencies in LTI xblock #234

Job	Run time
collect-and-verify (3.8, 3.2)	3m 4s
gh-hosted-python-3.8,django-3.2,lms-1	10m 20s
gh-hosted-python-3.8,django-3.2,lms-2	6m 37s
gh-hosted-python-3.8,django-3.2,lms-3	14m 51s
gh-hosted-python-3.8,django-3.2,lms-4	13m 45s
gh-hosted-python-3.8,django-3.2,lms-5	7m 42s
gh-hosted-python-3.8,django-3.2,lms-6	11m 35s
gh-hosted-python-3.8,django-3.2,openedx-1	11m 18s
gh-hosted-python-3.8,django-3.2,openedx-2	11m 55s
gh-hosted-python-3.8,django-3.2,openedx-3	7m 42s
gh-hosted-python-3.8,django-3.2,openedx-4	3m 33s
gh-hosted-python-3.8,django-3.2,cms-1	2m 48s
gh-hosted-python-3.8,django-3.2,cms-2	14m 17s
gh-hosted-python-3.8,django-3.2,common-1	7m 38s
gh-hosted-python-3.8,django-3.2,common-2	8m 49s
gh-hosted-python-3.8,django-3.2,common-3	3m 45s
	2h 19m 39s

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