Update StorefrontOnlyXProductLeftForSimpleProductsTest.xml

Author: engcom-Echo

app/code/Magento/Catalog/Test/Mftf/Test/StorefrontOnlyXProductLeftForSimpleProductsTest.xml

@@ -14,6 +14,7 @@
             <title value="See Only * Left block"/>
             <stories value="See Only * Left on product page if Only X left Threshold was set"/>
             <description value="See Only * Left on product page if Only X left Threshold was set"/>
+            <testCaseId value="MC-35235"/>
             <severity value="MINOR"/>
         </annotations>
         <before>