Comment 5 for bug 1806064

Reviewed: https://review.openstack.org/621664
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=5d514b33e28964b38aeb42a8dd5b93f3fc8ae239
Submitter: Zuul
Branch: master

commit 5d514b33e28964b38aeb42a8dd5b93f3fc8ae239
Author: Matt Riedemann <email address hidden>
Date: Mon Dec 3 12:55:11 2018 -0500

    Add functional regression test for bug 1806064

    Change I9269ffa2b80e48db96c622d0dc0817738854f602 in Pike
    introduced a race condition where creating multiple
    servers concurrently can fail the second instances quota
    check which happens in conductor after the instance record
    is created in the cell database but its related BDMs and
    tags are not stored in the cell DB. When deleting the
    server from the API, since the BDMs are not in the cell
    database with the instance, they are not "seen" and thus
    the volume attachments are not deleted and the volume is
    orphaned. As for tags, you should be able to see the tags
    on the server in ERROR status from the API before deleting
    it.

    This change adds a functional regression test to show both
    the volume attachment and tag issue when we fail the quota
    check in conductor.

    Change-Id: I21c2189cc1de6b8e4857de77acd9f1ef8b6ea9f6
    Related-Bug: #1806064