slapos_subscription_request: Set causality to be consistent with the Ticket API

master/bt5/slapos_subscription_request/SkinTemplateItem/portal_skins/slapos_subscription_request/Item_createSubscriptionRequest.py

@@ -62,6 +62,7 @@ except AssertionError as error:
   storeWorkflowComment(item, str(error))
   return
 subscription_request.setAggregateValue(item)
+subscription_request.setCausalityValue(item)
 
 subscription_request.reindexObject(activate_kw=activate_kw)
 item.reindexObject(activate_kw=activate_kw)