Comment 2 for bug 1446252

Reviewed: https://review.openstack.org/175606
Committed: https://git.openstack.org/cgit/openstack/heat/commit/?id=ad4c00e672fdd2c1c8461d7e4813dff4b093ae0f
Submitter: Jenkins
Branch: master

commit ad4c00e672fdd2c1c8461d7e4813dff4b093ae0f
Author: Zane Bitter <email address hidden>
Date: Mon Apr 20 19:12:07 2015 -0400

    Cancel nested stack updates when appropriate

    If a stack update is cancelled while the update of a nested stack is being
    processed, the nested stack update is no longer stopped since the
    implementation changed in Kilo to use the RPC API to control nested stacks.

    To alleviate this, use the RPC API to cancel the (nested) stack update when
    the resource update is cancelled. This results in a rollback of the nested
    stack, so if a subsequent attempt to roll back the ensted stack by doing a
    stack update fails due to the rollback already being in progress, just
    ignore the error and wait for the existing operation to complete.

    Change-Id: I3eacf216194517c995732a3f4de876551b70fe91
    Closes-Bug: #1446252