NO-JIRA fix flaky tests QueueControlTest#testChangeMessagePriority{,W…

…ithInvalidValue}

The occasional assertion error is prevented by using Wait.assertEquals
where Assert.assertEquals was used previously.

(cherry picked from commit c6521e0)

tests/integration-tests/src/test/java/org/apache/activemq/artemis/tests/integration/management/QueueControlTest.java

@@ -1926,7 +1926,7 @@ public void testChangeMessagePriority() throws Exception {
       producer.send(message);
 
       QueueControl queueControl = createManagementControl(address, queue);
-      Assert.assertEquals(1, getMessageCount(queueControl));
+      Wait.assertEquals(1, () -> getMessageCount(queueControl));
 
       // the message IDs are set on the server
       Map<String, Object>[] messages = queueControl.listMessages(null);
@@ -1959,7 +1959,7 @@ public void testChangeMessagePriorityWithInvalidValue() throws Exception {
       producer.send(message);
 
       QueueControl queueControl = createManagementControl(address, queue);
-      Assert.assertEquals(1, getMessageCount(queueControl));
+      Wait.assertEquals(1, () -> getMessageCount(queueControl));
 
       // the message IDs are set on the server
       Map<String, Object>[] messages = queueControl.listMessages(null);