Start using nova_metadata_host
Start using nova_metadata_host

nova_metadata_ip was deprecated in Pike and is being
removed in Queens, update its usage.

Depends-On: I8fa071834a67af6f062970a1f105c2f9a3a341da

Change-Id: Ie287f8852ed0fa7ebf759a50aa0dd2bb86c64212

dprince/tripleo-heat-templates,openstack/tripleo-heat-templates,openstack/tripleo-heat-templates,dprince/tripleo-heat-templates