tree b3811ed7b2c9d06d5539d78f497752d23ba09d07
parent bad4f096e1640a6d6966fb8c0cb63482c01b5580
author zhufl <zhu.fanglei@zte.com.cn> 1488267813 +0800
committer zhufl <zhu.fanglei@zte.com.cn> 1488267813 +0800

Use base.attach_volume in test_attach_volume

This is to use base.attach_volume to replace the internal
function _attach_volume.
Besides, in _detach_volume NotFound exception shouldn't be
ignored, so this is also to remove _detach_volume.

Change-Id: I74c75baeecc4ae05d3769a9c19090d98cbff9998