Use VIP for keystone host in swift template
Use VIP for keystone host in swift template

As a side effect this fixes invalid keystone host generation
when multiple controller nodes are used.

Change-Id: I081976f0da94fc0232dfa2c34de03bbb4abf1a85

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