removed sf2 references

Author: fabpot

Loader/XmlFileLoader.php

@@ -597,7 +597,7 @@ public function validateSchema(\DOMDocument $dom)
         foreach ($schemaLocations as $namespace => $location) {
             $parts = explode('/', $location);
             if (0 === stripos($location, 'phar://')) {
-                $tmpfile = tempnam(sys_get_temp_dir(), 'sf2');
+                $tmpfile = tempnam(sys_get_temp_dir(), 'symfony');
                 if ($tmpfile) {
                     copy($location, $tmpfile);
                     $tmpfiles[] = $tmpfile;