Speed up tests

Running the full suite of tests took me 5.5 minutes before; now it takes a smidge over 2.

It only speeds up tests that don't pass any arguments to getEmptyDeck, but that's nearly all of them!

test_remote_sync has four errors, but it had four errors beforehand, so I'm gonna call that a draw. 

test_new has errors "every once in a while" -- not sure what to do about that -- but that is also true independent of these changes.

There's one other unrelated failing test that I have a fix for. See my next PR.