tree a8d866b98d43f61fe89357c1e9f3b8e599a16ed2
parent 4f5e426d10452db85925d02f35074932aae115db
author zhufl <zhu.fanglei@zte.com.cn> 1474947203 +0800
committer zhufl <zhu.fanglei@zte.com.cn> 1474970160 +0800

Wait for floating_ip to detach from server after deletion

test_minimum_basic_scenario expects floating_ip detaching
from server immediately after deletion, and this may not
be true in production clouds(we watched in our system that
it took about 5 seconds for the floating_ip to disappear
from server's address). So this is to add wait after
floating_ip deletion.

Change-Id: Iedc6197829f2cb388878fdb8e257489482a41d93