Set instance variables to null so that we don't OOM exceptions when using m2

git-svn-id: https://svn.apache.org/repos/asf/incubator/activemq/trunk@398076 13f79535-47bb-0310-9956-ffa450edef68

activemq-core/src/test/java/org/apache/activemq/JmsTransactionTestSupport.java

@@ -100,8 +100,12 @@ abstract public class JmsTransactionTestSupport extends TestSupport implements M
         log.info("Closing down connection");
 
         session.close();
+        session=null;
         connection.close();
+        connection=null;
         broker.stop();
+        broker=null;
+        
         log.info("Connection closed.");
     }
 

activemq-core/src/test/java/org/apache/activemq/broker/BrokerTestSupport.java

@@ -87,6 +87,10 @@ public class BrokerTestSupport extends CombinationTestSupport {
     
     protected void tearDown() throws Exception {
         broker.stop();
+        broker=null;    
+        regionBroker=null;    
+        persistenceAdapter=null;
+        memoryManager=null;
         super.tearDown();
     }
     

activemq-core/src/test/java/org/apache/activemq/broker/ft/TransactedTopicMasterSlaveTest.java

@@ -55,6 +55,7 @@ public class TransactedTopicMasterSlaveTest extends JmsTopicTransactionTest{
 
     protected void tearDown() throws Exception{
         slave.stop();
+        slave=null;
         super.tearDown();
     }