nova-consoleauth package and service removed as of Train

[Frode Nordahl]

The nova console authorization has been moved to the database backend since Rocky and at Train the separate service and package was removed.

https://github.com/openstack/nova/blob/master/releasenotes/notes/deprecate-nova-consoleauth-ed6ccbc324a0fb10.yaml

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/689120

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/689120
Committed: https://git.openstack.org/cgit/openstack/charm-nova-cloud-controller/commit/?id=bf2cd49829e720a449898caa6c6e835f26b52e9e
Submitter: Zuul
Branch: master

commit bf2cd49829e720a449898caa6c6e835f26b52e9e
Author: Frode Nordahl <email address hidden>
Date: Thu Oct 17 12:29:40 2019 +0200

    Remove ``nova-consoleauth`` package as of Train

    The Nova console authorization has been moved to the database
    backend and the separate service and package is no longer
    necessary.

    Change-Id: I672ae9538dc687a1c868bf99001041a54241ec24
    Closes-Bug: #1848478