Comment 9 for bug 1812398

Reviewed: https://review.openstack.org/632100
Committed: https://git.openstack.org/cgit/openstack-dev/devstack/commit/?id=c7114582c0b88f379cae795c8bc88bf840d0965a
Submitter: Zuul
Branch: stable/queens

commit c7114582c0b88f379cae795c8bc88bf840d0965a
Author: Matt Riedemann <email address hidden>
Date: Fri Jan 18 10:42:13 2019 -0500

    Restrict database access to nova-compute in singleconductor mode

    Change I4820abe57a023050dd8d067c77e26028801ff288 removed access
    to the database for the nova-compute process but only in
    superconductor mode. Grenade runs in singleconductor mode though
    so we are getting tracebacks in nova-compute logs during grenade
    runs because nova-compute is running with nova.conf which is
    configured with access to the nova API database.

    This change handles removing database access for nova-compute
    generically to cover both the singleconductor and superconductor
    cases.

    Conflicts:
          lib/nova

    NOTE(mriedem): Conflict is due to not having change
    I2a98795674183e2c05c29e15a3a3bad1a22c0891 in stable/queens.

    Change-Id: I81301eeecc7669a169deeb1e2c5d298a595aab94
    Closes-Bug: #1812398
    (cherry picked from commit 82537871376afe98a286e1ba424cf192ae60869a)
    (cherry picked from commit 1b2408b4f33710d404c4da4dde6bc096d6e691f4)