Comment 9 for bug 1718502

Reviewed: https://review.openstack.org/566297
Committed: https://git.openstack.org/cgit/openstack/tripleo-common/commit/?id=ac5e3fc860fbbde41a347bf2fe55838228e6dc88
Submitter: Zuul
Branch: stable/newton

commit ac5e3fc860fbbde41a347bf2fe55838228e6dc88
Author: Ben Nemec <email address hidden>
Date: Wed Sep 13 16:40:41 2017 +0000

    Add logging to capabilities filter

    The capabilities filter gets incorrectly blamed for a lot of
    deployment failures because on a retry of a node deployment the
    filter has to fail because there is only one node that can match
    when using predictable placement. However, we don't have any
    logging to help determine why the filter fails. This adds logging
    to explain why nodes fell through, which will hopefully help with
    debugging these problems.

    Change-Id: I702209e9b5a1e546bf8cb784eec8bdc3c97c63eb
    Closes-Bug: 1718502
    (cherry picked from commit e5d16155364c1dae2db238506f236194e2dfb1dc)