Comment 29 for bug 1830747

Reviewed: https://review.opendev.org/663110
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=20b90f2e26e6a46a12c2fd943b4472c3147528fa
Submitter: Zuul
Branch: stable/queens

commit 20b90f2e26e6a46a12c2fd943b4472c3147528fa
Author: Matt Riedemann <email address hidden>
Date: Tue May 28 11:24:11 2019 -0400

    Workaround missing RequestSpec.instance_group.uuid

    It's clear that we could have a RequestSpec.instance_group
    without a uuid field if the InstanceGroup is set from the
    _populate_group_info method which should only be used for
    legacy translation of request specs using legacy filter
    properties dicts.

    To workaround the issue, we look for the group scheduler hint
    to get the group uuid before loading it from the DB.

    The related functional regression recreate test is updated
    to show this solves the issue.

    Conflicts:
          nova/objects/request_spec.py

    NOTE(mriedem): The conflict is due to not having change
    Ib33719a4b9599d86848c618a6e142c71ece79ca5 in Queens.

    Change-Id: I20981c987549eec40ad9762e74b0db16e54f4e63
    Closes-Bug: #1830747
    (cherry picked from commit da453c2bfe86ab7a825f0aa7ebced15886f7a5fd)
    (cherry picked from commit 8569eb9b4fb905cb92041b84c293dc4e7af27fa8)
    (cherry picked from commit 9fed1803b4d6b2778c47add9c327f0610edc5952)