RFR: 8349533: Refactor validator tests shell files to java [v2]

[Mikhail Yankelevich]

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

Mikhail Yankelevich has updated the pull request incrementally with one additional commit since the last revision:

  keyStore is not used to delete, cleanup of the calls, minor refactoring

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Changes:
  - all: https://git.openjdk.org/jdk/pull/23727/files
  - new: https://git.openjdk.org/jdk/pull/23727/files/a2eed266..f333ddff

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=23727&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=23727&range=00-01

  Stats: 95 lines in 1 file changed: 43 ins; 26 del; 26 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