def _create_blockdevice_id_for_test(dataset_id):
    return "blockdevice-" + unicode(dataset_id)
List files in a S3 bucket.
dataset/ETHPy150Open ClusterHQ/flocker/flocker/node/agents/test/test_blockdevice.py/_create_blockdevice_id_for_test--crossover with--dataset/ETHPy150Open viewfinderco/viewfinder/backend/storage/s3_object_store.py/S3ObjectStore.ListKeys