Fix bug in checkout-service

Author: ArneLimburg

…on/create-interception-event-trigger.sql …0__create-interception-event-trigger.sqlcheckout-service/src/main/resources/db/migration/create-interception-event-trigger.sql renamed to checkout-service/src/main/resources/db/migration/V1_1_0__create-interception-event-trigger.sql checkout-service/src/main/resources/db/migration/create-interception-event-trigger.sql renamed to checkout-service/src/main/resources/db/migration/V1_1_0__create-interception-event-trigger.sql

@@ -42,9 +42,7 @@ public OrderAggregate findByCustomerAndStatus(@NotNull @Valid CustomerNumber cus
         return entityManager.createNamedQuery(OrderAggregate.FIND_BY_CUSTOMER_NUMBER, OrderAggregate.class)
                 .setParameter("customerNumber", customerNumber.number())
                 .setParameter("orderStatus", status)
-                .getResultStream()
-                .findAny()
-                .get();
+                .getSingleResult();
     }
 
     public OrderAggregate findByOrderNumber(OrderNumber number) {