Comment 8 for bug 1806515

Reviewed: https://review.openstack.org/624824
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=fa178ed4e5ab925d39f7176d851d3c735e328189
Submitter: Zuul
Branch: stable/queens

commit fa178ed4e5ab925d39f7176d851d3c735e328189
Author: Kevin_Zheng <email address hidden>
Date: Tue Dec 4 10:25:52 2018 +0800

    Handle tags in _bury_in_cell0

    We allowed add instance tags when booting in
    Iac54b9627cb4398e45f1f15a2f4e7d6f86242093, conductor
    will create tags for us in the selected cell, but
    we forgot to consider the case that no valid host
    was found.

    So we will be unable to filter those instances in
    cell0 with tags.

    Change-Id: Idfe37d356b349024dfe963c934728111e1a1d314
    closes-bug: #1806515
    (cherry picked from commit 3cd439ad8a99f122566f0b5d0264ff5c8d34f998)
    (cherry picked from commit cbb9eb5b056b96ea507d65fea0e32c27bbf6cdfa)