MC-2374: Create MFTF Tests

- Use logout action group instead of amOnPage

Author: davemacaulay

app/code/Magento/PageBuilder/Test/Mftf/Test/AdminCreateCategoryTest.xml

@@ -28,7 +28,7 @@
             <actionGroup ref="LoginAsAdmin" stepKey="loginAsAdmin"/>
         </before>
         <after>
-            <amOnPage url="admin/admin/auth/logout/" stepKey="amOnLogoutPage"/>
+            <actionGroup ref="logout" stepKey="logout"/>
         </after>
         <amOnPage url="{{AdminCategoryPage.url}}" stepKey="navigateToCategoryPage"/>
         <waitForElementVisible selector="{{AdminCategorySidebarActionSection.AddSubcategoryButton}}" stepKey="waitForSubCategoryBtn"/>