RFR: JDK-8307794 Test for HSS/LMS Signature Verification

[Mark Powers]

https://bugs.openjdk.org/browse/JDK-8307794

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Commit messages:
 - added more tests
 - remove carriage return
 - micro benchmark and jarsigner test
 - Ferenc's comments
 - Max's comments
 - iteration 2
 - iteration 1

Changes: https://git.openjdk.org/jdk/pull/13940/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13940&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8307794
  Stats: 5726 lines in 3 files changed: 5726 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/13940.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13940/head:pull/13940

PR: https://git.openjdk.org/jdk/pull/13940