Comment 9 for bug 1707071

Reviewed: https://review.openstack.org/491850
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=09e169bd7a74deaf52d9d6d38ff37799cab24157
Submitter: Jenkins
Branch: master

commit 09e169bd7a74deaf52d9d6d38ff37799cab24157
Author: Jay Pipes <email address hidden>
Date: Mon Aug 7 16:36:49 2017 -0400

    placement: refactor healing of allocations in RT

    Updates the RT method for "healing" instance allocations so that we
    only delete allocations (and delete them entirely for an instance) in
    the event that the instance has been local-deleted. Adds log statements
    to the method to give us a good idea of what the state of various
    things are during test runs.

    Note that this patch only partially fixes LP #1707071 to remove some of
    the back-and-forth allocation trampling that was going on for move
    operations. The next patch adds the final piece of the puzzle which is
    to have the confirm/revert resize step on the source or destination
    compute host *correct* a doubled-up allocation. What this patch does is
    prevent the healing function from deleting allocations unless the
    instance is local-deleted.

    Partial-bug: #1707071

    Change-Id: Ia0bb32fd92ae723c505d0fce5691e0fe0540f10d