add reindex after apllying price rule

Author: Nazar65

app/code/Magento/SalesRule/Test/Mftf/Test/StorefrontCartPriceRuleQuantity.xml

@@ -62,7 +62,8 @@
         <fillField selector="{{AdminCartPriceRulesFormSection.discountAmount}}" userInput="1.00" stepKey="fillDiscountAmount"/>
         <click selector="{{AdminCartPriceRulesFormSection.save}}" stepKey="clickSaveButton"/>
         <see selector="{{AdminCartPriceRulesSection.messages}}" userInput="You saved the rule." stepKey="seeSuccessMessage"/>
-
+        <actionGroup ref="CliRunReindexUsingCronJobsActionGroup" stepKey="reindexInvalidatedIndices"/>
+          
         <!-- Add 1 product to the cart -->
         <amOnPage url="$$createPreReqProduct.name$$.html" stepKey="goToProductPage"/>
         <waitForPageLoad stepKey="waitForProductPageLoad"/>