[BUGFIX] Switch order of PaymentEvent & StockEvent

The PaymentEvent has to be placed before the
StockEvent because the order can fail in the
PaymentEvent so the StockEvent has to be placed
after the PaymentEvent.
In case a PaymentProvider uses forwarding the
PaymentEvent and FinishEvent has to be triggered
within the EventListener of the PaymentEvent.
This is already described in the docs.

Fixes: #571

Classes/Controller/Cart/OrderController.php

@@ -220,18 +220,18 @@ protected function dispatchOrderCreateEvents(Item $orderItem): bool
             return true;
         }
 
-        $stockEvent = new StockEvent($this->cart, $orderItem, $this->configurations);
-        $this->eventDispatcher->dispatch($stockEvent);
-        if ($stockEvent instanceof StoppableEventInterface && $stockEvent->isPropagationStopped()) {
-            return true;
-        }
-
         $paymentEvent = new PaymentEvent($this->cart, $orderItem, $this->configurations);
         $this->eventDispatcher->dispatch($paymentEvent);
         if ($paymentEvent instanceof StoppableEventInterface && $paymentEvent->isPropagationStopped()) {
             return true;
         }
 
+        $stockEvent = new StockEvent($this->cart, $orderItem, $this->configurations);
+        $this->eventDispatcher->dispatch($stockEvent);
+        if ($stockEvent instanceof StoppableEventInterface && $stockEvent->isPropagationStopped()) {
+            return true;
+        }
+
         $finishEvent = new FinishEvent($this->cart, $orderItem, $this->configurations);
         $this->eventDispatcher->dispatch($finishEvent);
         if ($finishEvent instanceof StoppableEventInterface && $finishEvent->isPropagationStopped()) {