[FLS] Fix completion of responses without payload

This was forgotten in eclipse-passage#1258.

bundles/org.eclipse.passage.lic.jetty/src/org/eclipse/passage/lic/internal/jetty/JettyHandler.java

@@ -60,6 +60,7 @@ private void write(NetResponse response, Request request, Response answer, Callb
 		}
 		answer.setStatus(HttpStatus.OK_200);
 		if (!response.carriesPayload()) {
+			callback.succeeded();
 			return;
 		}
 		byte[] payload;