Comment 10 for bug 1570825

Reviewed: https://review.fuel-infra.org/20997
Submitter: Pkgs Jenkins <email address hidden>
Branch: 9.0/mitaka

Commit: 95493e5e431275b259b4a8d8b137c02bdb388d4c
Author: Oleksii Chuprykov <email address hidden>
Date: Fri May 20 14:23:00 2016

Fix cancel update for nova server with defined port

This particular patch fixes a behaviour of cancel update for nova
server with defined port, so there are no ports manageable by nova.
We have these issues while restoring ports after rollback:
1) We doesn't detach any ports from current server, because we
doesn't save them to resoruce data. (we store this data after
succesfull create of the server)
2) Detaching an interface from current server will fail, if the
server will be in building state, so we need to wait until server
will be in active or in error state.
Refresh ports list to solve problem (1).
Wait until nova moves to active/error state to solve (2).

Closes-Bug: #1570825
Partial-Bug: #1570908
Change-Id: I737736f572aae4d9ac67b8878bc40ca6b3ea4674