Comment 7 for bug 1715325

Reviewed: https://review.openstack.org/501556
Committed: https://git.openstack.org/cgit/openstack/watcher/commit/?id=3a7fc7a8e502f9ac0db28aefcd1e9f2742a15e44
Submitter: Jenkins
Branch: master

commit 3a7fc7a8e502f9ac0db28aefcd1e9f2742a15e44
Author: chenghuiyu <email address hidden>
Date: Thu Sep 7 11:36:23 2017 +0800

    Utils: fix usage of strtime

    As oslo_utils.timeutils.strtime() is deprecated in
    version '1.6', and will be removed in a future version.

    For more informations:
    https://docs.openstack.org/oslo.utils/latest/reference/timeutils.html

    Change-Id: I1aca257fbe8b08c3478c5da9639835033b19144a
    Partial-Bug: #1715325