fix test case after changes in https://issues.apache.org/jira/browse/AMQ-4237 broke the test's MBean lookup

git-svn-id: https://svn.apache.org/repos/asf/activemq/trunk@1428425 13f79535-47bb-0310-9956-ffa450edef68
fix test case after changes in https://issues.apache.org/jira/browse/AMQ-4237 broke the test's MBean lookup

git-svn-id: https://svn.apache.org/repos/asf/activemq/trunk@1428458 13f79535-47bb-0310-9956-ffa450edef68