tree 1b16ea4ce754090c541e11d251683256d4639cc0
parent 36754ed87ddd09d2cfe264f6b548b25dfaf87d89
author zhufl <zhu.fanglei@zte.com.cn> 1465723632 +0800
committer zhufl <zhu.fanglei@zte.com.cn> 1465723632 +0800

Add available params in attach_volume's comment

attach_volume in servers_client has **kwargs parameter, but
no api reference link is given. so this is to add "Available params"
in its comment.

Change-Id: Id1c937d456ecb8dc64d050eccf7686ca20794036