RFR: 8314495: Update to use jtreg 7.3.1

[Christian Stein]

Please review the change to update to using jtreg 7.3,1.

The primary change is to the `jib-profiles.js` file, which specifies the version of jtreg to use, for those systems that rely on this file. In addition, the `requiredVersion` has been updated in the various `TEST.ROOT` files.

This change set also un-problem-lists tests from https://github.com/openjdk/jdk/commit/360f65d7b15b327e2f160c42f318945cc6548bda

This change set also fixes:
- https://bugs.openjdk.org/browse/JDK-8313902
- https://bugs.openjdk.org/browse/JDK-8313903

Testing: _tier1-tier5 pending..._

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Commit messages:
 - Un-problem-list tests failing with jtreg 7.3
 - 8314495: Update to use jtreg 7.3.1

Changes: https://git.openjdk.org/jdk/pull/15323/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15323&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8314495
  Stats: 12 lines in 9 files changed: 0 ins; 3 del; 9 mod
  Patch: https://git.openjdk.org/jdk/pull/15323.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15323/head:pull/15323

PR: https://git.openjdk.org/jdk/pull/15323