[ticket/12620] Add support of the environments for the ext routing files

PHPBB3-12620

tests/controller/ext/vendor2/bar/config/production/routing.yml

@@ -0,0 +1,3 @@
+controller3:
+    pattern: /bar
+    defaults: { _controller: bar.controller:handle }

tests/controller/ext/vendor2/bar/config/services.yml

@@ -0,0 +1,3 @@
+services:
+    bar.controller:
+        class: bar\controller

tests/controller/ext/vendor2/bar/controller.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace bar;
+
+use Symfony\Component\HttpFoundation\Response;
+
+class controller
+{
+	/**
+	* Handle method
+	*
+	* @return null
+	*/
+	public function handle()
+	{
+		return new Response('Test', 200);
+	}
+}