Ensure LMS passes correct group_id when querying content

common/test/acceptance/tests/discussion/test_cohorts.py

lms/djangoapps/django_comment_client/base/tests.py

lms/djangoapps/django_comment_client/base/views.py

lms/djangoapps/django_comment_client/forum/tests.py

lms/djangoapps/django_comment_client/forum/views.py

lms/djangoapps/django_comment_client/tests/group_id.py

lms/djangoapps/django_comment_client/tests/utils.py

lms/djangoapps/django_comment_client/utils.py