git: openjdk/jtreg: 2 new changesets

[Jonathan Gibbons]

Changeset: 717c3d15
Author:    Jonathan Gibbons <jonathan.gibbons at oracle.com>
Date:      2021-04-30 19:58:40 +0000
URL:       https://git.openjdk.java.net/jtreg/commit/717c3d154b0bf7277a5d272512c8360889e3fed3

update versions: JUnit 4.13.2, TestNG 7.4.0

! README.md
! make/build-support/version-numbers

Changeset: 598a367a
Author:    Jonathan Gibbons <jonathan.gibbons at oracle.com>
Date:      2021-04-30 20:01:46 +0000
URL:       https://git.openjdk.java.net/jtreg/commit/598a367a86aa8d7c573754fdf9344844bdee90d8

Merge remote-tracking branch 'upstream/master' into master