Option "vnc_enabled" from group "DEFAULT" is deprecated

[Peter Matulis]

This deprecation warning was found in nova-compute.log:

2019-07-17 22:31:33.482 44637 WARNING oslo_config.cfg [req-36da0399-910d-4078-a2af-36132db31f54 - - - - -] Option "vnc_enabled" from group "DEFAULT" is deprecated. Use option "enabled" from group "vnc".

Setup:

Bionic
OpenStack Queens
Juju 2.6.5
LXD containers [1]

LXD host:
Linux node-pytheas 4.15.0-54-generic #58-Ubuntu SMP Mon Jun 24 10:55:24 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

[1]: https://github.com/openstack-charmers/openstack-on-lxd

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/687301

[OpenStack Infra (hudson-openstack)]

Change abandoned by "James Page <email address hidden>" on branch: master
Review: https://review.opendev.org/c/openstack/charm-nova-compute/+/687301
Reason: This review is > 12 weeks without comment, and failed testing the last time it was checked. We are abandoning this for now. Feel free to reactivate the review by pressing the restore button and leaving a 'recheck' comment to get fresh test results.