junboli 9448e6e372 Api-ref: Fix the incorrect parameter description
In the attachment API, the response parameters, such as ``detached_at``,
``attached_at``, ``attach_mode``, ``instance`` are optional, however these
should be required, this is to fix these.

Change-Id: I2748e971655c3f5715585409e5c021f0d91690e4
2018-06-06 18:30:58 +08:00
..
2018-06-05 00:01:40 +00:00
2017-11-13 16:25:20 -05:00