RFR: 8371559: Intermittent timeouts in test javax/net/ssl/Stapling/HttpsUrlConnClient.java [v2]

[Arno Zeller]

> The test javax/net/ssl/Stapling/HttpsUrlConnClient.java sometimes hangs and run into timeouts. By adding some more tracing it showed that it can happen on machines with high load that the client thread throws a "Server not ready yet" RuntimeException because it only waits for 5 seconds for the server thread to come available.
> I added some more output in case of errors to better see the issue and use the timeout factor to modify the maximum wait time.

Arno Zeller 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 four additional commits since the last revision:

 - Use CountDownLatch
 - Merge remote-tracking branch 'upstream/master' into JDK-8371559
 - Merge branch 'openjdk:master' into JDK-8371559
 - Use timeout factor when waiting for server ready

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/28784/files
  - new: https://git.openjdk.org/jdk/pull/28784/files/4d0dda06..d2be50fa

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=28784&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=28784&range=00-01

  Stats: 5036 lines in 149 files changed: 2527 ins; 908 del; 1601 mod
  Patch: https://git.openjdk.org/jdk/pull/28784.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28784/head:pull/28784

PR: https://git.openjdk.org/jdk/pull/28784