MAGETWO-87775: Automate MFTF tests

- Added tests for downgrade pagebuilder product attribute

Author: kieuphan2406

dev/tests/acceptance/tests/functional/Magento/FunctionalTest/Catalog/Section/AdminCreateProductAttributeSection.xml

@@ -15,6 +15,7 @@
         <element name="AdvancedProperties" type="button" selector="#advanced_fieldset-wrapper"/>
         <element name="Default Value" type="input" selector="#default_value_text"/>
         <element name="Save" type="button" selector="#save"/>
+        <element name="SaveAndEdit" type="button" selector="#save_and_edit_button"/>
         <element name="TinyMCE4" type="button" selector="//span[text()='Default Value']/parent::label/following-sibling::div//div[@class='mce-branding-powered-by']"/>
         <element name="checkIfTabOpen" selector="//div[@id='advanced_fieldset-wrapper' and not(contains(@class,'opened'))]" type="button"/>
         <element name="SaveAndEdit" selector="#save_and_edit_button" type="button"/>