Add test condition

Author: acogoluegnes

src/test/java/com/rabbitmq/client/amqp/impl/ClusterTest.java

@@ -38,7 +38,7 @@
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.EnumSource;
 
-// @TestUtils.DisabledIfNotCluster
+@TestUtils.DisabledIfNotCluster
 public class ClusterTest {
 
   static final BackOffDelayPolicy BACK_OFF_DELAY_POLICY = BackOffDelayPolicy.fixed(ofMillis(100));