Comment 11 for bug 1773765

Reviewed: https://review.opendev.org/753921
Committed: https://git.openstack.org/cgit/openstack/masakari/commit/?id=b53155b314068a46cd097d3788add1b6d4fc0aff
Submitter: Zuul
Branch: stable/ussuri

commit b53155b314068a46cd097d3788add1b6d4fc0aff
Author: suzhengwei <sugar-2008@163.com>
Date: Fri Apr 17 08:59:35 2020 +0800

    check expired notifications

    Occasionally, there would be notifications which will remain 'new',
    'error' or 'running' status all times, and not to be processed again.
    Due to this, operator can not update the segment or host.

    This patch add one task to periodically check unfinished notifications.
    If one unfinished notification is expired, just set its status to
    'failed'.

    Close-Bug: #1773765
    Change-Id: If49635639dd976aeec3ea73e702ad2636fcf1e0a
    (cherry picked from commit 3a4f782441f6bdcfb8ee49a393937267fc246c56)