Comment 4 for bug 1841778

Reviewed: https://review.opendev.org/680350
Committed: https://git.openstack.org/cgit/openstack/compute-hyperv/commit/?id=9c07fe4b59ec7a8150a88411a8d20810dfc5bdb0
Submitter: Zuul
Branch: stable/stein

commit 9c07fe4b59ec7a8150a88411a8d20810dfc5bdb0
Author: Lucian Petrut <email address hidden>
Date: Wed Aug 28 13:07:46 2019 +0300

    Recreate ports for failed over instances

    OVS ports can become invalid after the instances are failed over.
    If an instance lands back on the initial host and the ports are
    not cleaned up, it will be left with those stale ports.

    This change adds a config option, allowing those ports to be recreated.
    It will be enabled by default. Deployers may consider disabling it
    if the remaining ports are cleaned up when rebooting nodes or if the
    network backend is not affected by this issue.

    Closes-Bug: #1841778

    Change-Id: I58aba53b7bc0a5e8954cf31adac6e7e106944b7e
    (cherry picked from commit 7dd16950d3dea87c9853c62fea26437de0dfd814)