RFR: 7902934: jtreg plugin should be friendly with different packaging layouts

[Jorn Vernee]

On Wed, 12 May 2021 17:06:00 GMT, Maurizio Cimadamore <mcimadamore at openjdk.org> wrote:

> This fix allows the plugin to work better across different versions of jtreg, as well as across different platforms.
> Sometimes testng and jcommander are bundled in the same jar, sometimes in separate jars. This patch simply walks through all the files with a `.jar` extension in the jtreg folder and adds them to the classpath of the IDE test configuration.

Works on my machine ��

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Marked as reviewed by jvernee (no project role).

PR: https://git.openjdk.java.net/jtreg/pull/10