[lworld] RFR: 8377867: [lworld] Cherry pick JDK-8376355 "Update to use jtreg 8.2.1"

[David Simms]

8376355: Update to use jtreg 8.2.1

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Commit messages:
 - 8376355: Update to use jtreg 8.2.1

Changes: https://git.openjdk.org/valhalla/pull/2100/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=2100&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8377867
  Stats: 17 lines in 9 files changed: 0 ins; 0 del; 17 mod
  Patch: https://git.openjdk.org/valhalla/pull/2100.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/2100/head:pull/2100

PR: https://git.openjdk.org/valhalla/pull/2100