RFR: 8344629: SSLSocketNoServerHelloClientShutdown test timeout [v3]

[Artur Barashev]

> SAP complains about SSLSocketNoServerHelloClientShutdown timing out in their test environment (concurrent test execution with high CPU load). This change addresses this issue in 2 ways:
> - Increase default timeout value
> - Allow adjustment of timeout value by setting "test.timeout.factor" system property

Artur Barashev has updated the pull request incrementally with one additional commit since the last revision:

  Adding CountDownLatch mechanism

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Changes:
  - all: https://git.openjdk.org/jdk/pull/22263/files
  - new: https://git.openjdk.org/jdk/pull/22263/files/e668ab8a..dcc23aea

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=22263&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=22263&range=01-02

  Stats: 10 lines in 1 file changed: 6 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/22263.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22263/head:pull/22263

PR: https://git.openjdk.org/jdk/pull/22263