fix(abstractitiltarget): set priority from urgency and impact (#3178)

Author: btry

inc/abstractitiltarget.class.php

@@ -428,6 +428,7 @@ protected function setTargetUrgency($data, $formanswer) {
       }
       if (!is_null($urgency) && $urgency != 0) {
          $data['urgency'] = $urgency;
+         $data['priority'] = CommonITILObject::computePriority($data['urgency'], $data['impact']);;
       }
 
       return $data;