void dispose() {
   try {
     saslServer.dispose();
   } catch (SaslException se) {
     log.trace("Failed to dispose SASL mechanism", se);
   }
 }
 @Override
 public void dispose() {
   try {
     server.dispose();
   } catch (SaslException e) {
   }
 }
 @After
 public void dispose() throws Exception {
   if (client != null) client.dispose();
   if (server != null) server.dispose();
   if (testKdc != null) testKdc.stopAll();
 }