skipped test and fixed test

Author: Manjusha.S

app/code/Magento/LoginAsCustomer/Test/Mftf/Test/AdminUINotShownIfLoginAsCustomerDisabledTest.xml

@@ -16,6 +16,9 @@
             <description value="Verify that UI elements are not shown if 'Login as customer' functionality is disabled"/>
             <severity value="CRITICAL"/>
             <group value="login_as_customer"/>
+            <skip>
+                <issueId value="ACQE-3906"/>
+            </skip>
         </annotations>
         <before>
             <magentoCLI command="config:set {{LoginAsCustomerConfigDataEnabled.path}} 0" stepKey="disableLoginAsCustomer"/>

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

@@ -19,6 +19,7 @@
             <group value="mtf_migrated"/>
         </annotations>
         <before>
+            <magentoCLI command="config:set {{EnableFlatRateConfigData.path}} {{EnableFlatRateConfigData.value}}" stepKey="enableFlatRate"/>
             <actionGroup ref="AdminLoginActionGroup" stepKey="LoginAsAdmin"/>
 
             <createData entity="Simple_US_Customer" stepKey="createCustomer"/>