RFR: 7903418: It is not possible to build jtreg 6.1 branch using jdk 11.0.18

[Christian Stein]

On Fri, 27 Jan 2023 08:05:46 GMT, Sergey Bylokhov <serb at openjdk.org> wrote:

>> It is not possible to build the jtreg 6.X using the recently released JDK 11.0.18. The root cause is a grep command in the Defs.gmk which checks the usage of jdk8. Because of that, all GitHub actions for jdk17u-dev and jdk11u-dev are broken:
>> see https://github.com/mrserb/jdk11u-dev/actions/runs/4018535809/jobs/6904278681
>
> This code does not exist in the master nor the 7.1 branch, so the patch cannot be applied there.

Seems like @mrserb needs to trigger the next step. Bots...

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PR: https://git.openjdk.org/jtreg/pull/146