[ticket/14044] Deduplicate the installers

PHPBB3-14044

tests/test_framework/mock/phpbb_mock_null_installer_task.php

@@ -0,0 +1,30 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+class phpbb_mock_null_installer_task extends \phpbb\install\task_base
+{
+	public function run()
+	{
+
+	}
+
+	static public function get_step_count()
+	{
+		return 0;
+	}
+
+	public function get_task_lang_name()
+	{
+		return '';
+	}
+}