MQE-1857: [MTF-To-MFTF] Process PR 746

- Try to fix some flakiness

Author: tomreece

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

@@ -31,6 +31,8 @@
             <argument name="category" value="$$createPreReqCategory$$"/>
             <argument name="simpleProduct" value="ProductWithUnicode"/>
         </actionGroup>
+        <magentoCLI command="indexer:reindex" stepKey="reindex"/>
+        <magentoCLI command="cache:flush" stepKey="flushCache"/>
         <actionGroup ref="AssertProductInStorefrontCategoryPage" stepKey="assertProductInStorefront1">
             <argument name="category" value="$$createPreReqCategory$$"/>
             <argument name="product" value="ProductWithUnicode"/>

app/code/Magento/Sales/Test/Mftf/Test/AdminCreateCreditMemoPartialRefundTest.xml

@@ -80,6 +80,7 @@
         <waitForPageLoad stepKey="waitForResultPage"/>
 
         <!-- Perform all assertions: assert refund success create message -->
+        <waitForElementVisible selector="{{AdminIndexManagementSection.successMessage}}" stepKey="waitForSuccessMessage"/>
         <see selector="{{AdminIndexManagementSection.successMessage}}" userInput="You created the credit memo." stepKey="assertRefundSuccessCreateMessage"/>
 
         <!-- Assert Credit Memo button -->