Merge pull request #19 from aneno-m-e/fix-t19-tests

[T19] Replace deprecated testcase classes with core_phpunit

Author: danmarsden

tests/engine_test.php

@@ -35,7 +35,7 @@
  * @copyright   2017 Catalyst IT
  * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
-class search_postgresfulltext_engine_testcase extends advanced_testcase {
+class search_postgresfulltext_engine_testcase extends \core_phpunit\testcase {
 
     /**
      * @var \core_search::manager