RFR: 7903931: Add "test.thread.factory" property to filter tests based on test thread factory value [v2]

[Leonid Mesnik]

> jtreg support test thread factory parameter that allows to execute tests by running main in virtual thread.
> 
> Currently, all incompatible tests are problemlisted. However after security manager removal the number of such tests is small.
> 
> So is it makes sense to add "jtreg.ttf" property to filter tests based on test thread factory value to allow filter out incompatible tests.
> 
> The only jtreg knows if -testThreadFactory is set so it should set corresponding property

Leonid Mesnik has updated the pull request incrementally with one additional commit since the last revision:

  test.thread.factory is set

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

Changes:
  - all: https://git.openjdk.org/jtreg/pull/242/files
  - new: https://git.openjdk.org/jtreg/pull/242/files/7b9299c0..7cbb70ad

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jtreg&pr=242&range=01
 - incr: https://webrevs.openjdk.org/?repo=jtreg&pr=242&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jtreg/pull/242.diff
  Fetch: git fetch https://git.openjdk.org/jtreg.git pull/242/head:pull/242

PR: https://git.openjdk.org/jtreg/pull/242