[jdk21u-dev] RFR: 8345133: Test sun/security/tools/jarsigner/TsacertOptionTest.java failed: Warning found in stdout

[Paul Hohensee]

Backport for parity with Oracle 21.0.8. Clean, low risk: test only, modified test passes, eliminates warning.

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Commit messages:
 - Backport 153dc6d84300e4c3446e33be820c15336cf45e72

Changes: https://git.openjdk.org/jdk21u-dev/pull/1601/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1601&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8345133
  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1601.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1601/head:pull/1601

PR: https://git.openjdk.org/jdk21u-dev/pull/1601