Add RialtoParachain <> Millau bridge to test deployments (#1412)

* add RialtoParachain <> Millau bridge to test deployments

* flush (still not working, but possible fix in comments)

* proper fix

* fixed on-demand parachains relay case: if better relay header is delivered, then we must select para header that may be proved using this relay header

* dashboards

* fmt

* removing debugging code

* more cleanup

bridges/relays/client-substrate/src/client.rs

@@ -187,6 +187,8 @@ impl<C: Chain> Client<C> {
 			params.host,
 			params.port,
 		);
+		log::info!(target: "bridge", "Connecting to {} node at {}", C::NAME, uri);
+
 		let client = tokio
 			.spawn(async move {
 				RpcClientBuilder::default()