RFR: 8349151: Refactor test/java/security/cert/CertificateFactory/slowstream.sh to java test [v4]

[Mikhail Yankelevich]

> Refactor test/java/security/cert/CertificateFactory/slowstream.sh to java test

Mikhail Yankelevich has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains five additional commits since the last revision:

 - further cleanup
 - Merge branch 'master' into JDK-8349151
 - Rajan's comments
 - cleanup
 - JDK-8349151: Refactor test/java/security//cert/CertificateFactory/slowstream.sh to java test

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/23394/files
  - new: https://git.openjdk.org/jdk/pull/23394/files/520fcde6..763b07c8

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=23394&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=23394&range=02-03

  Stats: 221560 lines in 5040 files changed: 100237 ins; 92140 del; 29183 mod
  Patch: https://git.openjdk.org/jdk/pull/23394.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23394/head:pull/23394

PR: https://git.openjdk.org/jdk/pull/23394