
When running micro-services on compute nodes, nova & libvirt are separated & isolated (ie: containers). nova::migration::libvirt used to configure both nova & libvirt to support migration. This patch makes possible to select what we want (libvirt, nova or both). It will configure all by default for backward compatibility. Depends-On: I33e565638f39ace819645215912303d6e431870c Change-Id: I1a1cb827512b12289558b296a7e64ce2dc71f00a