Our installation uses separate networks for deployment and
OpenStack management. The current default of 'ansible_host' for
the VNC server results in it binding to our deployment network.
Whilst this could be resolved via variable overrides, the majority
of the defaults and templated options in this role use the Nova
management address as the default choice for binding to.
This patch changes the default VNC bind address to match the
existing standard pattern, which should avoid the need for
overrides in most cases. As a result, for our setup, when
nova_management_address is identified and set in the OSA nova
playbooks to match the OpenStack management network, the VNC server
bind address gets set to the correct address.
Change-Id: I9c5e2584f8f1d9bd76120b8b236e25f63804473a