Comment 20 for bug 1819963

Reviewed: https://review.openstack.org/648414
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=1b15a342e3e174af745274ca62185e7e8f7f6cf9
Submitter: Zuul
Branch: stable/queens

commit 1b15a342e3e174af745274ca62185e7e8f7f6cf9
Author: Matt Riedemann <email address hidden>
Date: Wed Mar 13 15:53:09 2019 -0400

    Add functional recreate test for bug 1819963

    When resizing a server that was not created in an explicit
    zone, the scheduler can pick a host in another zone and
    conductor will update the instance.availability_zone value
    for the new dest host zone.

    The problem is when reverting the resize, the server goes
    back to the original source host/zone but the
    instance.availability_zone value in the database is not
    updated which can lead to incorrect results when listing
    servers and filtering by zone.

    This adds a functional recreate test for the bug.

    Change-Id: Ib107650d6a2c991c26b646a0dd10ddc7a3fb7e56
    Related-Bug: #1819963
    (cherry picked from commit 73aaead294b9df412305abb1cb01aac95477bcc1)
    (cherry picked from commit 0b2345442dfc99586c1e2b5ca13c54fe8045e5c8)
    (cherry picked from commit 440c0fb0ad7b127dfdcfb7302e0e31fa41d5255a)