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

[Radim Vansa]

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

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Commit messages:
 - Let ReseedTest use stdout rather than exit codes

Changes: https://git.openjdk.org/crac/pull/55/files
 Webrev: https://webrevs.openjdk.org/?repo=crac&pr=55&range=00
  Stats: 5 lines in 1 file changed: 1 ins; 1 del; 3 mod
  Patch: https://git.openjdk.org/crac/pull/55.diff
  Fetch: git fetch https://git.openjdk.org/crac.git pull/55/head:pull/55

PR: https://git.openjdk.org/crac/pull/55