NO-JIRA smoke tests hanging on termination

tests/smoke-tests/src/test/java/org/apache/activemq/artemis/tests/smoke/common/SmokeTestBase.java

@@ -47,6 +47,9 @@ public class SmokeTestBase extends ActiveMQTestBase {
 
    @After
    public void after() throws Exception {
+      // close ServerLocators before killing the server otherwise they'll hang and delay test termination
+      closeAllServerLocatorsFactories();
+
       for (Process process : processes) {
          try {
             ServerUtil.killServer(process, true);