Add bay column to container

magnum container-list only return container's uuid, name and status, say if we have different bays, the return result won't tell
where the container is running on.

+--------------------------------------+-----------+---------+
| uuid | name | status |
+--------------------------------------+-----------+---------+
| 2f6f5142-0f81-44eb-91f8-373b4bcce864 | test_ping | Stopped |
| b8079ed3-02db-4022-b304-f9d1c1102f59 | test_ping | Stopped |
+--------------------------------------+-----------+---------+