[ticket/12090] Move find() call to container and fix tests

PHPBB3-12090

phpBB/config/services.yml

@@ -109,6 +109,8 @@ services:
         class: phpbb\controller\provider
         arguments:
             - @ext.finder
+        calls:
+            - [find, [%core.root_path%]]
 
     cron.task_collection:
         class: phpbb\di\service_collection

phpBB/phpbb/controller/helper.php

@@ -66,7 +66,7 @@ class helper
 		$this->config = $config;
 		$this->phpbb_root_path = $phpbb_root_path;
 		$this->php_ext = $php_ext;
-		$this->route_collection = $provider->find($this->phpbb_root_path)->get_routes();
+		$this->route_collection = $provider->get_routes();
 	}
 
 	/**