RFR: CODETOOLS-7903083: Provide system property or option to override timeout [v2]

[Jonathan Gibbons]

> This is a PR to disable timeouts when test debug options have been set.

Jonathan Gibbons has updated the pull request incrementally with one additional commit since the last revision:

  Update copyright years

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Changes:
  - all: https://git.openjdk.java.net/jtreg/pull/47/files
  - new: https://git.openjdk.java.net/jtreg/pull/47/files/48723e14..70404e48

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jtreg&pr=47&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jtreg&pr=47&range=00-01

  Stats: 10 lines in 6 files changed: 4 ins; 0 del; 6 mod
  Patch: https://git.openjdk.java.net/jtreg/pull/47.diff
  Fetch: git fetch https://git.openjdk.java.net/jtreg pull/47/head:pull/47

PR: https://git.openjdk.java.net/jtreg/pull/47