MDL-75777 phpunit: Move tests to use correct names and ns (take#6)

Applied the following changes to various testcase classes:

- Namespaced with component[\level2-API]
- Moved to level2-API subdirectory when required.
- Fixed incorrect use statements with leading backslash.
- Remove file phpdoc block
- Remove MOODLE_INTERNAL if not needed.
- Changed code to point to global scope when needed.
- Fix some relative paths and comments here and there.
- All them passing individually.
- Complete runs passing too.

question/engine/tests/questionutils_test.php

@@ -14,29 +14,24 @@
 // You should have received a copy of the GNU General Public License
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
 
-/**
- * This file contains tests for the {@link question_utils} class.
- *
- * @package    moodlecore
- * @subpackage questionengine
- * @copyright  2010 The Open University
- * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
- */
+namespace core_question;
 
+use question_utils;
 
 defined('MOODLE_INTERNAL') || die();
 
 global $CFG;
 require_once(__DIR__ . '/../lib.php');
 
-
 /**
  * Unit tests for the {@link question_utils} class.
  *
+ * @package    core_question
+ * @category   test
  * @copyright  2010 The Open University
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
-class question_utils_test extends advanced_testcase {
+class questionutils_test extends \advanced_testcase {
     public function test_arrays_have_same_keys_and_values() {
         $this->assertTrue(question_utils::arrays_have_same_keys_and_values(
                 array(),
@@ -207,17 +202,17 @@ class question_utils_test extends advanced_testcase {
     }
 
     public function test_int_to_roman_too_small() {
-        $this->expectException(moodle_exception::class);
+        $this->expectException(\moodle_exception::class);
         question_utils::int_to_roman(0);
     }
 
     public function test_int_to_roman_too_big() {
-        $this->expectException(moodle_exception::class);
+        $this->expectException(\moodle_exception::class);
         question_utils::int_to_roman(4000);
     }
 
     public function test_int_to_roman_not_int() {
-        $this->expectException(moodle_exception::class);
+        $this->expectException(\moodle_exception::class);
         question_utils::int_to_roman(1.5);
     }