EZP-29455: Mark test as Platform only (#981)

Author: mnocon

Features/Standard/platformui.feature

@@ -19,7 +19,7 @@ Feature: Basic PlatformUI interaction tests
         When I click on the navigation item "Content structure"
         Then I click on the action bar button "Minimize"
 
-    @common @javascript
+    @common @javascript @platformOnly
     Scenario: As a admin User, I want to edit content
        Given I go to PlatformUI app with username "admin" and password "publish"
          And I click on the navigation zone "Content"