Ignore StompServerIntegrationTests until Reactor 3

Since IO Platform plugin provide its own dependencies configuration we can't enforce Reactor 2.0 usage.
From other side the Rector 2.0 support doesn't make sense for the next IO version.

* `@Ignore` the test class which is based on the Reactor 2.0 foundation until SF STOMP module provides Reactor 3.0 solution

spring-integration-stomp/src/test/java/org/springframework/integration/stomp/client/StompServerIntegrationTests.java

@@ -28,8 +28,8 @@ import static org.junit.Assert.fail;
 import org.apache.activemq.broker.BrokerService;
 import org.junit.AfterClass;
 import org.junit.BeforeClass;
+import org.junit.Ignore;
 import org.junit.Test;
-
 import org.springframework.context.ApplicationEvent;
 import org.springframework.context.ApplicationListener;
 import org.springframework.context.ConfigurableApplicationContext;
@@ -67,6 +67,7 @@ import org.springframework.util.SocketUtils;
  * @author Gary Russell
  * @since 4.2
  */
+@Ignore("Until Reactor 3.0 support: https://jira.spring.io/browse/INT-4125. IO Cairo doesn't support Reactor 2.0")
 public class StompServerIntegrationTests extends LogAdjustingTestSupport {
 
 	private static BrokerService activeMQBroker;