RFR: JDK-8289798: Update to use jtreg 7 [v5]

Tue Aug 30 09:33:05 UTC 2022

On Tue, 30 Aug 2022 09:14:12 GMT, Jaikiran Pai <jpai at openjdk.org> wrote:

> Hello Christian, is it intentional that in some file the minimum required jtreg version is represented as `7` (`lib-tests.m4`) and in some other files as `7+1` (GitHub actions config file, then the TEST.ROOT files)?

Yes. Some systems require the exact version tag `7+1` others only the short version string `7`.

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PR: https://git.openjdk.org/jdk/pull/9393