[jdk24u] RFR: 8346049: jdk/test/lib/security/timestamp/TsaServer.java warnings

[Konanki Sreenath]

clean backport

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Commit messages:
 - Backport 1eb54e4228ba9319ac2f980055ed366dd861ec0b

Changes: https://git.openjdk.org/jdk24u/pull/140/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk24u&pr=140&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8346049
  Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk24u/pull/140.diff
  Fetch: git fetch https://git.openjdk.org/jdk24u.git pull/140/head:pull/140

PR: https://git.openjdk.org/jdk24u/pull/140