RFR: 8249824: s/n/w/p/https/HttpsURLConnection/CloseKeepAliveCached.java uses @ignore w/o bugid [v5]

[Mikhail Yankelevich]

> * fully automated the test
> * removed the race condition
> * client on a thread and server on a thread options are now run together automatically

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:

 - Merge branch 'master' into JDK-8249824
 - cleanup and update of the code to the current style
 - minor comment changes
 - Apply suggestions from cr
   
   Co-authored-by: Daniel Fuchs <67001856+dfuch at users.noreply.github.com>
 - JDK-8249824: s/n/w/p/https/HttpsURLConnection/CloseKeepAliveCached.java uses @ignore w/o bugid
   
   * fully automated the test
   * removed the race condition
   * client on a thread and server on a thread options are now run together automatically

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/23469/files
  - new: https://git.openjdk.org/jdk/pull/23469/files/2bff4a34..ad0e7f3b

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=23469&range=04
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=23469&range=03-04

  Stats: 792793 lines in 10957 files changed: 358230 ins; 363171 del; 71392 mod
  Patch: https://git.openjdk.org/jdk/pull/23469.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23469/head:pull/23469

PR: https://git.openjdk.org/jdk/pull/23469