Remove upper bounds on lifeless test libraries

Robert assures us that he's not going to break backwards compat. We know
where he lives, so if he does, we can all just point our fingers and
laugh - but for now I think it's fair to take him at his word.

Change-Id: Ica3bdeceb1c6da3eb3d7d432ce7eb22cf61f1100
Merge "Remove upper bounds on lifeless test libraries"