QA: Add browser tests for story 1610

Define expected login behaviour for anon users and authenticated
users on login screen.

Change-Id: If0c7a7886c7a0c1ea56ffdcf59cf39236917bb6c
Story 1610: Promote already logged in message to stable

Remove standard message box when logged in message shows.

Change-Id: I3a22e2a2e5285fd5ccec8139c2e1dcd6e35029e9
Merge "QA: Add browser tests for story 1610"
Merge "Story 1610: Promote already logged in message to stable"