In Debian, SPICE is the default. Unfortunately, puppet-openstack fails to
set [spice]/enabled = false when VNC is selected, and therefore, both VNC
and SPICE ends up being enabled in nova.conf.
Also, Debian has a unique package nova-consoleproxy handling SPICE, VNC
and the XenVNC console, with /etc/default/nova-consoleproxy being used to
select what daemon to start. As puppet-openstack doesn't set it before
starting the VNC console service, it stays with spicehtml5 as default
value, and therefore, nova-novncproxy cannot start.
This patch fixes both issues.
Change-Id: Ia40805f27e8833fa01576432ae792e1becedd729