Comment 7 for bug 1796689

Reviewed: https://review.openstack.org/632516
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=70b4cdce68f9b1543c032aa700e4f0f4289d90a6
Submitter: Zuul
Branch: stable/queens

commit 70b4cdce68f9b1543c032aa700e4f0f4289d90a6
Author: Lucian Petrut <email address hidden>
Date: Mon Oct 8 17:13:55 2018 +0300

    Fix os-simple-tenant-usage result order

    nova usage-list can return incorrect results, having resources counted
    twice. This only occurs when using the 2.40 microversion or later.

    This microversion introduced pagination, which doesn't work properly.
    Nova API will sort the instances using the tenant id and instance uuid,
    but 'os-simple-tenant-usage' will not preserve the order when returning
    the results.

    For this reason, subsequent API calls made by the client will use the
    wrong marker (which is supposed to be the last instance id), ending
    up counting the same instances twice.

    Change-Id: I6c7a67b23ec49aa207c33c38580acd834bb27e3c
    Closes-Bug: #1796689
    (cherry picked from commit afc3a16ce3364c233e6e1cffc9f38987d1d65318)
    (cherry picked from commit 133b194ba079abe84900d09a5c3c74ef9f464bab)