Comment 3 for bug 1628938

Reviewed: https://review.openstack.org/384896
Committed: https://git.openstack.org/cgit/openstack/os-win/commit/?id=031f349d495f7e5437c30d4501419b94ad6122c0
Submitter: Jenkins
Branch: stable/newton

commit 031f349d495f7e5437c30d4501419b94ad6122c0
Author: Lucian Petrut <email address hidden>
Date: Thu Sep 29 16:59:09 2016 +0300

    Fix clustered VM migration status polling

    When migrating a clustered VM, we rely on the cluster resource
    group status in order to determine whether the VM was properly
    migrated.

    After a migration is requested, the resource group immediately
    enters a 'pending' state. At the moment, the method polling the
    resource group state uses a list of valid transition states,
    incorrectly appending the desired state of the resource group
    to this list.

    This causes issues if the migration fails, as we're not going to
    detect this and we'll continue polling indefinitely (unless a
    timeout is passed).

    This change fixes this issue by removing the desired state from
    the valid transition states list.

    Change-Id: Id1bdd6ccc6a2a6abc99e86ca362e03eb5adb66a2
    Closes-Bug: #1628938
    (cherry picked from commit d4ad19dc0fa90466d2b0ac0b9daa0830fdb6c467)