RFR: 8278456: Define jtreg jdk_desktop test group time-based sub-tasks for use by headful testing.

[Alexey Ivanov]

On Thu, 9 Dec 2021 17:49:00 GMT, Phil Race <prr at openjdk.org> wrote:

> Define part1/part2/part3 for client jtreg tests as done for some other areas
> See the bug report for some numbers on the potential benefits of this for faster testing.

Marked as reviewed by aivanov (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/6784