Fix values of ROUTE_NAME and ROUTE_OBJECT to what they used to be before d0b651

https://github.com/symfony-cmf/Routing/commit/d0b651467366446dba8011c172184bdabd9a6d96 introduced the constants ROUTE_NAME and ROUTE_OBJECT in RouteObjectInterface.php, but as exemplified in the <a href="https://github.com/symfony-cmf/Routing/commit/d0b651467366446dba8011c172184bdabd9a6d96#diff-1">UrlMatcher.php diff</a>, the constants values don't match what the values were before.