Add connection/disconnection of signal handler to setUp and tearDown.
Remove get_user_model from TineProfile (it's not lazy).
Remove unused import.
Remove ForeignKey to TineProfile from FlaggedByUser due to weird related_name requirements.
Add explicit ForeignKeys to flag models. Change name of FlaggedByUser to FlagItem.
Remove GenericRelation from TineProfile to Vote (was incorrect).
Add explicit table names to flag models.
Explicitly set tablename for AchievementsAwarded.
Rename test files as needed for discovery by Django test runner.
Change 'not in' to 'in'.