Exposing 'instance_name_template' to be set via
extra config for nuage-metadata-agent to function
Making nova::api::admin_tenant_name
available on the compute node which is
required by nuage-metadata-agent service
Making KeystonePublicApiVirtualIP available
on the compute node, which is used by the
nuage-metadata-agent to build the auth-url
Change-Id: I9736015e18cebf32b07940bf559063b60085f2fb