Comment 4 for bug 1555320

Reviewed: https://review.openstack.org/382195
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=f085fbd7d3bfdf016a37ccc7e6e28786425f0e4e
Submitter: Jenkins
Branch: master

commit f085fbd7d3bfdf016a37ccc7e6e28786425f0e4e
Author: Timofey Durakov <email address hidden>
Date: Tue Oct 4 16:42:09 2016 +0300

    Change log level to debug for migrations pairing

    For resize/cold-migration it's possible that instance
    already changed host to destination, but no confirm/revert
    has happened yet. In that case resource tracked starts spamming
    errors, because it's impossible to match migration and instance.
    It's safe to lower log level to debug in that case.

    Change-Id: I70cb7426e0e2849ee7d01205ce7b2d883a126d66
    Closes-Bug: #1555320