Temporarily re-enable ReactorNetty2StompBrokerRelayIntegrationTests

To see if it still fails on the CI server as it doesn't fail locally
for me, and if it does to get details to investigate.

See gh-29287

Author: rstoyanchev

spring-messaging/src/test/java/org/springframework/messaging/simp/stomp/ReactorNetty2StompBrokerRelayIntegrationTests.java

@@ -16,8 +16,6 @@
 
 package org.springframework.messaging.simp.stomp;
 
-import org.junit.jupiter.api.Disabled;
-
 import org.springframework.messaging.tcp.TcpOperations;
 import org.springframework.messaging.tcp.reactor.ReactorNetty2TcpClient;
 
@@ -27,7 +25,6 @@
  *
  * @author Rossen Stoyanchev
  */
-@Disabled("gh-29287 :: Disabled because they fail too frequently")
 public class ReactorNetty2StompBrokerRelayIntegrationTests extends AbstractStompBrokerRelayIntegrationTests {
 
 	@Override