resolved flatrate errors

Author: Manjusha.S

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

@@ -19,6 +19,7 @@
             <group value="sales"/>
         </annotations>
         <before>
+            <magentoCLI command="config:set {{EnableFlatRateConfigData.path}} {{EnableFlatRateConfigData.value}}" stepKey="enableFlatRate"/>
             <createData entity="_defaultCategory" stepKey="createCategory"/>
             <createData entity="_defaultProduct" stepKey="createSimpleProductApi">
                 <requiredEntity createDataKey="createCategory"/>

app/code/Magento/Shipping/Test/Mftf/Test/AdminDisableShipmentCommentsTest.xml

@@ -18,6 +18,7 @@
         </annotations>
 
         <before>
+            <magentoCLI command="config:set {{EnableFlatRateConfigData.path}} {{EnableFlatRateConfigData.value}}" stepKey="enableFlatRate"/>
             <createData entity="Simple_US_Customer" stepKey="createCustomer"/>
             <createData entity="SimpleProduct2" stepKey="createSimpleProduct"/>
             <createData entity="CustomerCart" stepKey="createCustomerCart">