MAGETWO-91710: Creditmemo Grand Total is incorrect if discount is applied on shipping

- updated correct testCaseId

Author: dthampy

dev/tests/acceptance/tests/functional/Magento/FunctionalTest/Sales/Test/CreditMemoTotalAfterShippingDiscountTest.xml

@@ -14,7 +14,7 @@
             <title value="Verify credit memo grand total after shipping discount is applied via Cart Price Rule"/>
             <description value="Verify credit memo grand total after shipping discount is applied via Cart Price Rule"/>
             <severity value="MAJOR"/>
-            <testCaseId value="MAGETWO-91710"/>
+            <testCaseId value="MAGETWO-92924"/>
             <group value="sales"/>
         </annotations>
         <before>