tree 7b27ab1da83c7eda03e1d70805c95c8ef92327dc
parent 2e7fe40e09a846a1cf20ffd7d7b2c3d9f0f5e767
author zhufl <zhu.fanglei@zte.com.cn> 1487063453 +0800
committer zhufl <zhu.fanglei@zte.com.cn> 1489476053 +0800

Use base.create_image_from_server to create server snapshot

In I8ee2e18925e7f4f09d10d857fb25f3d9b8e8bd42, SnapshotNotFoundException
is added to base.create_image_from_server to get more friendly
error info, so testcases should use base.create_image_from_server
as far as possible, moreover, the code will look simpler.

Change-Id: I34ae75d56b4243d67a1a9ec48d033b1e7d6356a7