add Backward Compatibility

Author: Usik2203

app/code/Magento/Checkout/Test/Mftf/Test/DefaultBillingAddressShouldBeCheckedOnPaymentPageTest.xml

@@ -50,6 +50,7 @@
         </actionGroup>
         <!--Click "Save Addresses" -->
         <actionGroup ref="StorefrontCheckoutClickSaveAddressButtonActionGroup" stepKey="saveAddress"/>
+        <comment userInput="StepKey Backward Compatibility" stepKey="waitForAddressSaved"/>
         <dontSeeElement selector="{{StorefrontCheckoutAddressPopupSection.newAddressModalPopup}}" stepKey="dontSeeModalPopup"/>
         <!--Select Shipping Rate "Flat Rate" and click "Next" button-->
         <actionGroup ref="CheckoutSelectFlatRateShippingMethodActionGroup" stepKey="selectFlatRateShipping"/>

app/code/Magento/Checkout/Test/Mftf/Test/OnePageCheckoutAsCustomerUsingNewAddressTest.xml

@@ -70,7 +70,7 @@
             <argument name="address" value="UK_Not_Default_Address"/>
         </actionGroup>
         <actionGroup ref="StorefrontCheckoutClickSaveAddressButtonActionGroup" stepKey="saveNewAddress"/>
-
+        <comment userInput="StepKey Backward Compatibility" stepKey="waitForAddressSaving"/>
         <!-- Click next button to open payment section -->
         <actionGroup ref="StorefrontCheckoutClickNextOnShippingStepActionGroup" stepKey="clickNext"/>
 

app/code/Magento/Checkout/Test/Mftf/Test/StorefrontCustomerPlaceOrderWithNewAddressesThatWasEditedTest.xml

@@ -53,6 +53,7 @@
 
         <!--Click "Save Addresses" -->
         <actionGroup ref="StorefrontCheckoutClickSaveAddressButtonActionGroup" stepKey="saveAddress"/>
+        <comment userInput="StepKey Backward Compatibility" stepKey="waitForAddressSaved"/>
         <dontSeeElement selector="{{StorefrontCheckoutAddressPopupSection.newAddressModalPopup}}" stepKey="dontSeeModalPopup"/>
 
         <!--Select Shipping Rate "Flat Rate"-->

app/code/Magento/Tax/Test/Mftf/Test/StorefrontTaxQuoteCheckoutTest/StorefrontTaxQuoteCheckoutLoggedInSimpleTest.xml

@@ -115,6 +115,7 @@
             <argument name="classPrefix" value="._show"/>
         </actionGroup>
         <actionGroup ref="StorefrontCheckoutClickSaveAddressButtonActionGroup" stepKey="saveAddress"/>
+        <comment userInput="StepKey Backward Compatibility" stepKey="waitForAddressSaved"/>
         <see stepKey="seeAddress2" selector="{{CheckoutShippingSection.selectedShippingAddress}}" userInput="{{SimpleTaxCA.state}}"/>
         <actionGroup ref="StorefrontCheckoutClickNextOnShippingStepActionGroup" stepKey="clickNext2"/>