'Create cs_thread with minimal fields and register response'

def register_thread(self, overrides=None):

    cs_thread = make_minimal_cs_thread({u'id': u'test_thread', u'course_id': unicode(self.course.id), u'commentable_id': u'test_topic', u'username': self.user.username, u'user_id': str(self.user.id), u'thread_type': u'discussion', u'title': u'Test    Title', u'body': u'Test    body'})
    cs_thread.update((overrides or {}))
    self.register_get_thread_response(cs_thread)
    self.register_put_thread_response(cs_thread)
