Dynamic asset selection based on container config.

   @Deployment
   public static Archive<?> createTestArchive(WebArchive war, ContainerConfiguration config)
   {
      war.addPackage(Game.class.getPackage())
            .addWebResource(new ByteArrayAsset(new byte[0]), "beans.xml");
      if (config instanceof GlassFishConfiguration) {
         war.addWebResource("glassfish-persistence.xml", "classes/META-INF/persistence.xml");
      }
      else if (config instanceof JBossASConfiguration) {
         war.addWebResource("jbossas-persistence.xml", "classes/META-INF/persistence.xml");
      }
      return war;
   }