Workaround a side effect while attempting to resolve JORAM-335.

joram/joram/client/jms/src/main/java/org/objectweb/joram/client/jms/pool/PooledConnection.java

@@ -67,7 +67,7 @@ public class PooledConnection implements Connection {
    */
   public void close() throws JMSException {
     // Cleans the connection, remove the ExceptionListener, stops it..
-    delegate.cleanup();
+    delegate.cleanup(true);
     delegate.setExceptionListener(null);
     delegate.stop();
     // .. then inserts it in the pool.