[lworld] RFR: 8350109: [lworld] Adopt jtreg 7.5.1 [v2]

[Roger Riggs]

> Jtreg is updated to 7.5.1
> 7.5.1 drops support for LIBRARY.properties.
> Some tests have added @enableProperties to pass.

Roger Riggs has updated the pull request incrementally with one additional commit since the last revision:

  Updated requireVersion in test/docs/TEST.ROOT to 7.5.1+1

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

Changes:
  - all: https://git.openjdk.org/valhalla/pull/1369/files
  - new: https://git.openjdk.org/valhalla/pull/1369/files/6f867914..5af07de8

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=valhalla&pr=1369&range=01
 - incr: https://webrevs.openjdk.org/?repo=valhalla&pr=1369&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/valhalla/pull/1369.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1369/head:pull/1369

PR: https://git.openjdk.org/valhalla/pull/1369