Merge branch '3-expand-tests' into empty_app

MySU/settings/test.py

apps/MySU/fixtures/preset/study_records.json

apps/MySU/models/association_specific_data.py

apps/MySU/viewsets/association_specific_data.py

apps/MySU/viewsets/association_specific_data_fields.py

apps/calendar/viewsets/event.py

tests/MySU/association.py

tests/MySU/association_specific_data.py

tests/MySU/association_specific_data_fields.py

tests/MySU/group.py

tests/MySU/group_membership.py

tests/MySU/profile.py

tests/MySU/study.py

tests/MySU/study_record.py

tests/MySU/user.py