tidy up test completion, allowing consumers to exit gracefully from blocking receive

activemq-unit-tests/src/test/java/org/apache/activemq/bugs/TransactedStoreUsageSuspendResumeTest.java

@@ -141,6 +141,9 @@ public class TransactedStoreUsageSuspendResumeTest {
 
         boolean allMessagesReceived = messagesReceivedCountDown.await(120, TimeUnit.SECONDS);
         assertTrue("Got all messages: " + messagesReceivedCountDown, allMessagesReceived);
+
+        // give consumers a chance to exit gracefully
+        TimeUnit.SECONDS.sleep(2);
     }
 
     private void sendMessages() throws Exception {