begin middleware management

src/Utils/Dbo/LuMiddlewareDbo.php

@@ -16,7 +16,7 @@ class LuMiddlewareDbo extends LuDbo
      * @param $middleware string
      * @param $parameters array
      */
-    public function __construct($middleware, $parameters = [])
+    public function __construct($middleware = "", $parameters = [])
     {
         $this->_middleware = $middleware;
         $this->_parameters = $parameters;