Stack staus when update rollback is triggered is misleading

[Pavlo Shchelokovskyy]

Currently when rollback is triggered during stack update, the stack continues to have status UPDATE_IN_PROGRESS and only at the very end flips to ROLLBACK_COMPLETE.

We should rather set state to ROLLBACK as soon as rollback is triggered to indicate to user that something went wrong.

[Openstack Gerrit (openstack-gerrit)]

Fix proposed to branch: master
Review: https://review.openstack.org/92371

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/92371
Committed: https://git.openstack.org/cgit/openstack/heat/commit/?id=7c9494a910f30afb734e00d2bbfd6c994cacc507
Submitter: Jenkins
Branch: master

commit 7c9494a910f30afb734e00d2bbfd6c994cacc507
Author: Pavlo Shchelokovskyy <email address hidden>
Date: Tue May 6 14:44:42 2014 +0300

    Set rollback status early in update if triggered

    Before when rollback was triggered during stack update, the stack continued to
    have status UPDATE_IN_PROGRESS, and only at the very end flipped to
    ROLLBACK_COMPLETE.
    This patch sets the stack state to ROLLBACK as soon as
    rollback is started to notify the user properly on the action being
    performed.

    Change-Id: Idbd78a3a2a8d0c32fb26c7d0c38c87857d1565d8
    Closes-Bug: #1316558