fix test case AGAIN (I wanted it to test both when the Locust class has no task_set and when the TaskSet has no tasks)
fix test case AGAIN (I wanted it to test both when the Locust class has no task_set and when the TaskSet has no tasks)

mbeacom/locust,mbeacom/locust,mbeacom/locust,locustio/locust,locustio/locust,locustio/locust,locustio/locust,mbeacom/locust