[GSS](7.2.z) Use UUID for default instance-id

With EAP 6, a UUID would be used for a default route value if instance-id was not specified.

With EAP 7, it defaults to ${jboss.node.name} instead. In many cases, such a UUID would be preferred as a default of dynamic configurations. Can such a UUID be the default again for EAP 7 like EAP 6?