Wait for any nova server status that makes sense

Nova may return some transient states based on operator actions that do
not mean a resource has failed. Rather than report these as unexpected,
wait on them just like BUILD.

Fixes bug #1140324

Change-Id: I757c073fb8a7da44f41e9a9cb9ae71dbc35d3c33
Merge "Wait for any nova server status that makes sense"