[ticket/17535] Convert config files, make data providers static

PHPBB-17535

tests/mock/user.php

@@ -24,6 +24,7 @@ class phpbb_mock_user
 	public $style = [];
 	public $data = [];
 	public $lang = [];
+	public $ip = '';
 
 	private $options = array();
 	public function optionget($item, $data = false)