[crac] RFR: Let ReseedTest use stdout rather than exit codes

[Anton Kozlov]

On Fri, 24 Mar 2023 10:25:41 GMT, Radim Vansa <duke at openjdk.org> wrote:

> There was a 1:256 chance of test randomly failing because the random generators produced the same number, despite differently seeded.

LGTM, thanks!

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Marked as reviewed by akozlov (Lead).

PR Review: https://git.openjdk.org/crac/pull/55#pullrequestreview-1356574174