RFR: 8349533: Refactor validator tests shell files to java

[Mikhail Yankelevich]

Changed shell files to be java tests:
* ./validator/certreplace.sh
* ./validator/samedn.sh

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Commit messages:
 - changed to 2 different test ids
 - 8349533: Refactor validator tests shell files to java

Changes: https://git.openjdk.org/jdk/pull/23727/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=23727&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8349533
  Stats: 326 lines in 3 files changed: 151 ins; 174 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/23727.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23727/head:pull/23727

PR: https://git.openjdk.org/jdk/pull/23727