Update silex-orm to use Redis instead of APC

frameworks/PHP/php-silex-orm/web/index.php

@@ -35,7 +35,7 @@ $app->register(new DoctrineOrmServiceProvider, array(
                 'use_simple_annotation_reader' => false,
             ),
         ),
-        'metadata_cache' => 'apc'
+        'metadata_cache' => 'redis'
     ),
 ));