List servers compute API V2 server status cleanup.

Server status need to be updated to reflect current standards.
Adding statuses like STOPPED, PAUSED, SOFT_DELETED and updating
old values to new ones like RESCUED, RESIZED, DELETED.

Closes-Bug: #1245881

Change-Id: Ib55ef13a0422ffe82a25bc186353c290e04b40c4
Merge "List servers compute API V2 server status cleanup."