Add new failing test case: Non-player can terminate judging

The code that is intending to check whether all answering players have
completed judging is currently broken. It is only checking whether the
number of players that have judged is as large as the number of
players that have answered.

This is the wrong logic in the case where a player who didn't answer
joins the game late and submits judging results, which is exactly what
we do in the new test case here.

This test case currently fails, so a fix of the bug described above
will cause it to start passing.