ignore flaky test

Author: Technoboy-

tests/src/test/java/io/streamnative/pulsar/handlers/mqtt/broker/AdapterChannelTest.java

@@ -39,9 +39,10 @@
 import java.util.concurrent.ConcurrentMap;
 import java.util.stream.Collectors;
 import org.mockito.Mockito;
+import org.testng.annotations.Ignore;
 import org.testng.annotations.Test;
 
-@Test(enabled = false)
+@Ignore
 public class AdapterChannelTest extends MQTTTestBase {
 
     @Override