MAGETWO-91697: [Magento Cloud] "Tier Pricing" of Products changes to "Price" (without discount) after Updated Items and Quantities

- Update automated test

Author: nikshostko

app/code/Magento/Catalog/Test/Mftf/ActionGroup/AdminProductActionGroup.xml

@@ -197,6 +197,7 @@
         <maximizeWindow stepKey="maximizeWindow"/>
         <waitForElement selector="{{AdminProductFormAdvancedPricingSection.customerGroupPriceAddButton}}" stepKey="waitForCustomerGroupPriceAddButton"/>
         <click selector="{{AdminProductFormAdvancedPricingSection.customerGroupPriceAddButton}}" stepKey="addCustomerGroupAllGroupsQty1PriceDiscountAnd10percent"/>
+        <waitForElement selector="{{AdminProductFormAdvancedPricingSection.productTierPriceCustGroupSelect('0')}}" stepKey="waitForSelectCustomerGroupNameAttribute2"/>
         <selectOption selector="{{AdminProductFormAdvancedPricingSection.productTierPriceWebsiteSelect('0')}}" userInput="{{website}}" stepKey="selectProductWebsiteValue"/>
         <selectOption selector="{{AdminProductFormAdvancedPricingSection.productTierPriceCustGroupSelect('0')}}" userInput="{{group}}" stepKey="selectProductCustomGroupValue"/>
         <fillField selector="{{AdminProductFormAdvancedPricingSection.productTierPriceQtyInput('0')}}" userInput="{{quantity}}" stepKey="fillProductTierPriceQtyInput"/>