enbale flat rate in AdminMassOrdersReleasePendingOrderTest

Author: glo74186

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

@@ -20,6 +20,7 @@
         </annotations>
         <before>
             <actionGroup ref="AdminLoginActionGroup" stepKey="LoginAsAdmin"/>
+            <magentoCLI command="config:set {{EnableFlatRateConfigData.path}} {{EnableFlatRateConfigData.value}}" stepKey="enableFlatRate"/>
 
             <!-- Create Data -->
             <createData entity="Simple_US_Customer" stepKey="createCustomer"/>