Merge branch 'hotfix/7/3-customer' into 'release_7-lts'

Test: Ensure proper use of `unserialize`

Closes #3

See merge request ilias-lts/ilias!20

Modules/TestQuestionPool/classes/class.assOrderingQuestion.php

@@ -737,7 +737,7 @@ public function calculateReachedPointsFromPreviewSession(ilAssQuestionPreviewSes
 
         $solutionOrderingElementList = unserialize(
             $previewSession->getParticipantsSolution(),
-            ['allowed_classes' => false]
+            ['allowed_classes' => true]
         );
 
         $reachedPoints = $this->calculateReachedPointsForSolution($solutionOrderingElementList);