ATS-467 : T-Engine logs fill up with ActiveMQ errors when used in ACS Community edition

- instantiate JMS beans only when 'activemq.url' property is set
- fix integration tests

alfresco-transformer-base/src/test/java/org/alfresco/transformer/AbstractQueueTransformServiceIT.java

@@ -26,12 +26,8 @@
  */
 package org.alfresco.transformer;
 
-import static org.alfresco.transform.client.model.Mimetype.MIMETYPE_OPENXML_WORDPROCESSING;
-import static org.alfresco.transform.client.model.Mimetype.MIMETYPE_PDF;
 import static org.junit.Assert.assertEquals;
 
-import java.util.UUID;
-
 import javax.jms.Queue;
 
 import org.alfresco.transform.client.model.TransformReply;
@@ -49,7 +45,7 @@ import org.springframework.test.context.junit4.SpringRunner;
  * created on 15/01/2019
  */
 @RunWith(SpringRunner.class)
-@SpringBootTest
+@SpringBootTest(properties = {"activemq.url=nio://localhost:61616"})
 public abstract class AbstractQueueTransformServiceIT
 {
     @Autowired