MDL-61380 Quiz: Re-attempting the same "random" question by tag

Some question behaviours allow the same question to be re-attempted several times during a quiz attempt.
This commit takes care of the case where a "random" question is re-attempted during a quiz attempt.

mod/quiz/attemptlib.php

@@ -568,7 +568,7 @@ class quiz_attempt {
         $this->quba = question_engine::load_questions_usage_by_activity($this->attempt->uniqueid);
         $this->slots = $DB->get_records('quiz_slots',
                 array('quizid' => $this->get_quizid()), 'slot',
-                'slot, requireprevious, questionid');
+                'slot, requireprevious, questionid, includingsubcategories, tags');
         $this->sections = array_values($DB->get_records('quiz_sections',
                 array('quizid' => $this->get_quizid()), 'firstslot'));
 
@@ -1873,9 +1873,11 @@ class quiz_attempt {
         if ($questiondata->qtype != 'random') {
             $newqusetionid = $questiondata->id;
         } else {
+            $tagids = quiz_extract_random_question_tag_ids($this->slots[$slot]->tags);
+
             $randomloader = new \core_question\bank\random_question_loader($qubaids, array());
             $newqusetionid = $randomloader->get_next_question_id($questiondata->category,
-                    (bool) $questiondata->questiontext);
+                    (bool) $questiondata->questiontext, $tagids);
             if ($newqusetionid === null) {
                 throw new moodle_exception('notenoughrandomquestions', 'quiz',
                         $this->quizobj->view_url(), $questiondata);