MQE-1960: MFTF 3.0.0

Addressed review comments on #479

Author: soumyau

app/code/Magento/PageBuilder/Test/Mftf/Test/AdminCMSBlockDisablePageBuilderTest/AdminCreateCmsBlockWithMarginalSpaceTest.xml

@@ -11,9 +11,11 @@
     <test name="AdminCreateCmsBlockWithMarginalSpaceTest">
         <before>
             <magentoCLI command="config:set cms/pagebuilder/enabled 0" stepKey="disablePageBuilder" after="loginGetFromGeneralFile"/>
+            <magentoCLI command="cache:clean config" stepKey="flushCache" after="disablePageBuilder"/>
         </before>
         <after>
             <magentoCLI command="config:set cms/pagebuilder/enabled 1" stepKey="enablePageBuilder" before="adminLogout"/>
+            <magentoCLI command="cache:clean config" stepKey="flushCache" after="enablePageBuilder"/>
         </after>
     </test>
 </tests>