[HttpFoundation] Fixed Request HTTP_USER_AGENT on 3.X versions

Author: davelima

src/Symfony/Component/HttpFoundation/Request.php

@@ -311,7 +311,7 @@ public static function create($uri, $method = 'GET', $parameters = array(), $coo
             'SERVER_NAME' => 'localhost',
             'SERVER_PORT' => 80,
             'HTTP_HOST' => 'localhost',
-            'HTTP_USER_AGENT' => 'Symfony/2.X',
+            'HTTP_USER_AGENT' => 'Symfony/3.X',
             'HTTP_ACCEPT' => 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
             'HTTP_ACCEPT_LANGUAGE' => 'en-us,en;q=0.5',
             'HTTP_ACCEPT_CHARSET' => 'ISO-8859-1,utf-8;q=0.7,*;q=0.7',