ActionsIT: Adapt to new error message

I7a8389e98d9e20794b06245dab007d93fed7ccf3, (f3614b0b8a,
Improve error message for grayed out submit buttons, 2nd edition)

broke the tests as an error message was off by a dot "." at the end.

Change-Id: Ic201e49dab555fdeee7afffe577e1c9d1d6a89b2
1 file changed