RFR: 8346050: Update BuildTestLib.gmk to build whole testlibrary

[Leonid Mesnik]

The fix add remaining classes to the testlibrary jar and fix some warnings in security-related classes.

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Commit messages:
 - 8346050: Update BuildTestLib.gmk to build whole testlibrary

Changes: https://git.openjdk.org/jdk/pull/23525/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=23525&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8346050
  Stats: 20 lines in 5 files changed: 14 ins; 0 del; 6 mod
  Patch: https://git.openjdk.org/jdk/pull/23525.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23525/head:pull/23525

PR: https://git.openjdk.org/jdk/pull/23525