Comment 9 for bug 1714237

Reviewed: https://review.openstack.org/507687
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=f90c61cd88edce74e3dbfd069beb2c33793d3371
Submitter: Jenkins
Branch: master

commit f90c61cd88edce74e3dbfd069beb2c33793d3371
Author: Matt Riedemann <email address hidden>
Date: Tue Sep 26 17:37:19 2017 -0400

    Remove dest node allocations during live migration rollback

    When a live migration fails or is cancelled, either during
    pre_live_migration on the destination host or during the
    actual live migration itself, we rollback from the failure/abort
    by doing things like removing volume connections from the
    destination host and re-setup the network on the source host.

    As part of the rollback from a failed or cancelled live migration,
    we also need to remove the allocations created in Placement for the
    destination node, since the instance is not on the destination
    node.

    Change-Id: I7b70cf8d5233bd25bf865a1b2789640758493c2b
    Closes-Bug: #1715182
    Closes-Bug: #1714237