SCORU/Tezt: fix timeout test logic.

Context

Thanks to @vch9 for noticing that the comments in the Tezt test for timeout were not aligned with the code.

Specifically, [operator2] starts a dispute. Its opponent, [operator1], won't play. suggests that it's operator1's turn to play first, while it's in fact operator2's turn (the refuter, i.e. the one who initiates the game, as defined here).

This request fixes the comment, as well as the source of the timeout, which is operator2 right now. It's not wrong and the result is the same (a timeout), but I feel like it makes more sense that the timeoutter is the player who didn't actually timed-out.

Checklist

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