Comment 6 for bug 1822917

Reviewed: https://review.opendev.org/652994
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=2bbd7f4a0ce0df0a5d1789848796178491fbea40
Submitter: Zuul
Branch: stable/stein

commit 2bbd7f4a0ce0df0a5d1789848796178491fbea40
Author: Takashi NATSUME <email address hidden>
Date: Thu Apr 4 11:17:06 2019 +0900

    Change a log level for overwriting allocation

    Change a log level for overwriting allocation
    to debug instead of warning
    because the log message is output in the normal case
    of reverting resize.

    Change-Id: I4f2ee3f420b4c78385eeb56c7e8c343af894e75c
    Closes-Bug: #1822917
    (cherry picked from commit d955ce42cc16149cc9ffe7f698210d85792b63a0)