tree 32bcad3d8b9912d3618a2ba3490bebf98f8fe5ec
parent 268cd656bce3f731aa847ae6f827d51960128880
author zhufl <zhu.fanglei@zte.com.cn> 1476005936 +0800
committer zhufl <zhu.fanglei@zte.com.cn> 1476006374 +0800

Remove unused func _detach

Func _detach is not used in test_volumes_snapshots, so this is
to remove it.
Besides, func cleanup_snapshot should be placed before testcases.

Change-Id: I961a3400a3777c6032815e2ee9c68f0cd76a43c2