'Get a course hierarchy to test with.'

def get_course_hierarchy(self):

    return [{'org': 'MilestonesTransformer', 'course': 'PE101F', 'run': 'test_run', '#type': 'course', '#ref': 'course'}, {'#type': 'sequential', '#ref': 'A', '#children': [{'#type': 'vertical', '#ref': 'B'}, {'#type': 'vertical', '#ref': 'C'}]}, {'#type': 'sequential', '#ref': 'ProctoredExam', 'is_time_limited': True, 'is_proctored_enabled': True, 'is_practice_exam': False, '#children': [{'#type': 'vertical', '#ref': 'D'}, {'#type': 'vertical', '#ref': 'E'}]}, {'#type': 'sequential', '#ref': 'PracticeExam', 'is_time_limited': True, 'is_proctored_enabled': True, 'is_practice_exam': True, '#children': [{'#type': 'vertical', '#ref': 'F'}, {'#type': 'vertical', '#ref': 'G'}]}, {'#type': 'sequential', '#ref': 'H', '#children': [{'#type': 'vertical', '#ref': 'I'}]}, {'#type': 'sequential', '#ref': 'TimedExam', 'is_time_limited': True, 'is_proctored_enabled': False, 'is_practice_exam': False, '#children': [{'#type': 'vertical', '#ref': 'J'}, {'#type': 'vertical', '#ref': 'K'}]}]
