RFR: 8331682: Increase default timeout value

[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

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Commit messages:
 - 8331682: Increase test timeout value

Changes: https://git.openjdk.org/jdk/pull/22263/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=22263&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8331682
  Stats: 7 lines in 1 file changed: 4 ins; 1 del; 2 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