Fix BrokerService no longer setting started flag back to false when stop finishes causing some tests to fail.

git-svn-id: https://svn.apache.org/repos/asf/activemq/trunk@1424019 13f79535-47bb-0310-9956-ffa450edef68

activemq-broker/src/main/java/org/apache/activemq/broker/BrokerService.java

@@ -733,6 +733,7 @@ public class BrokerService implements Service {
             // Clear SelectorParser cache to free memory
             SelectorParser.clearCache();
         } finally {
+            started.set(false);
             stopped.set(true);
             stoppedLatch.countDown();
         }