make glance.host point to controller_virtual_ip
make glance.host point to controller_virtual_ip

Previously glance.host was pointing to the local controller_host
which would have requests to glance from other services to fail
if the local glance daemon was unavailable.

Change-Id: Ifd4f4b12cd51e23313826288797cc00ba3cd1754

rdo-management/tripleo-heat-templates,bcrochet/tripleo-heat-templates,dprince/tripleo-heat-templates,trozet/opnfv-tht,trozet/opnfv-tht,dprince/tripleo-heat-templates,trozet/tripleo-heat-templates,trozet/tripleo-heat-templates,openstack/tripleo-heat-templates,redhat-openstack/tripleo-heat-templates,wyg3958/tripleo-heat-templates,openstack/tripleo-heat-templates,redhat-openstack/tripleo-heat-templates,bcrochet/tripleo-heat-templates,wyg3958/tripleo-heat-templates,bcrochet/tripleo-heat-templates,trozet/opnfv-tht,rdo-management/tripleo-heat-templates