cells can apply resize/rebuild messages out of order

[Chris Behrens]

There's no expected_task_state checking for rebuild/resize instance updates, so it's possible that out of order messages can be applied.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/55581

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/55581
Committed: http://github.com/openstack/nova/commit/67c1cb4f1c25235c63c4c2c76e19292887cbd207
Submitter: Jenkins
Branch: master

commit 67c1cb4f1c25235c63c4c2c76e19292887cbd207
Author: Chris Behrens <email address hidden>
Date: Thu Nov 7 19:29:30 2013 +0000

    Cells: check states on resize/rebuild updates

    When the API cell receives instance updates, check the task states for
    any resize and rebuild states. Make sure to only apply them if the
    current task state for the instance is what we expect. This will fix
    any out of order messages from potentially stomping on re-setting the
    instance to ACTIVE/None on finish of the actions.

    Change-Id: Id79e35e29170ac2b8f42a955cecaae3072aba09c
    Closes-bug: 1249072