NO-JIRA sanity test of mqtt shared sub publish with fqqn

tests/integration-tests/src/test/java/org/apache/activemq/artemis/tests/integration/mqtt5/MQTT5Test.java

@@ -524,6 +524,11 @@ public class MQTT5Test extends MQTT5TestSupport {
       producer.publish(TOPIC, new byte[0], 1, false);
       assertTrue(ackLatch.await(2, TimeUnit.SECONDS));
 
+      // sanity send using fqqn as we can know the name of a shared sub
+      ackLatch.countUp();
+      producer.publish(TOPIC + "::" + SUB_NAME + "/" + TOPIC, new byte[0], 1, false);
+      assertTrue(ackLatch.await(2, TimeUnit.SECONDS));
+
       producer.disconnect();
       producer.close();
       consumer1.disconnect();