Load routes for specific env first

It's common to add a 'wildcard' route to an application that looks like
a CMS. Usually the route has the following path `/{slug}`.

But with the current routes loading order, the 'dev' routing is loaded
after regular routes. In previous SF versions, dev routing was loaded
first. This PR retores this behavior.

Author: lyrixx

symfony/framework-bundle/4.2/src/Kernel.php

@@ -41,8 +41,8 @@ protected function configureRoutes(RouteCollectionBuilder $routes)
     {
         $confDir = $this->getProjectDir().'/config';
 
-        $routes->import($confDir.'/{routes}/*'.self::CONFIG_EXTS, '/', 'glob');
         $routes->import($confDir.'/{routes}/'.$this->environment.'/**/*'.self::CONFIG_EXTS, '/', 'glob');
+        $routes->import($confDir.'/{routes}/*'.self::CONFIG_EXTS, '/', 'glob');
         $routes->import($confDir.'/{routes}'.self::CONFIG_EXTS, '/', 'glob');
     }
 }