Comment 4 for bug 1777458

Reviewed: https://review.openstack.org/579561
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=f1cb6f1647025539093dc2cdd52da3ed129a6f5c
Submitter: Zuul
Branch: stable/queens

commit f1cb6f1647025539093dc2cdd52da3ed129a6f5c
Author: Matt Riedemann <email address hidden>
Date: Mon Jun 18 10:27:43 2018 -0400

    Fix regression when listing build_requests with marker and ip filter

    Change Ic02206e887e3fea7752d615bbed680510c482097 attempted
    to optimize the GET /servers flow by skipping filtering on
    build requests if the ip or ip6 filters were used, since
    servers that are not yet scheduled (build requests) can't have
    ips. However, if a marker is provided and the marker is in the
    build_requests table, we fail to look there and then check the
    cells for the marker, which won't exist and result in a 400
    MarkerNotFound error.

    This fixes the issue by *not* skipping build requests if there
    is a marker specified. A functional test is added which will
    show the 400 MarkerNotFound error if the code fix is removed.

    Change-Id: Ibdd157d06252c3c0219539ec798c8d9d3a8ae26f
    Closes-Bug: #1777458
    (cherry picked from commit 8cea14abf30c40da4ce5ffcfb4fb37dd79083255)