WizardCommandController must not cache initialized commands

   @Override
   public void initializeUI(UIBuilder builder) throws Exception
   {
      UIContext uiContext = builder.getUIContext();
      PersistenceContainer pc = (PersistenceContainer) uiContext.getAttribute(PersistenceContainer.class);
      initDBType(uiContext);
      initDatasourceName(uiContext);
      initPersistenceUnitName(builder);
      builder.add(dbType);
      if (pc.isJTASupported())
      {
         builder.add(dataSourceName);
      }
      else
      {
         builder.add(jdbcDriver).add(databaseURL).add(username).add(password);
      }
   }