tree a71cb10b42e5dc3ddbdb155b79414fed3960f85b
parent 3f5d149b3a32e713c60c59a054035ac2e5c73c28
author Ken'ichi Ohmichi <ken-oomichi@wx.jp.nec.com> 1479863916 -0800
committer Ken'ichi Ohmichi <ken-oomichi@wx.jp.nec.com> 1479864082 -0800

Make the parameter 'device' optional

As http://developer.openstack.org/api-ref/compute/?expanded=attach-a-volume-to-an-instance-detail
the parameter 'device' is optional and Nova Liberty+ clouds do
auto-assignment as the device with/without specifying the parameter.
This patch makes the parameter optional on AttachVolumeTestJSON.

Change-Id: I78c721c7c1c27460825ce483304d81864a39379b