RFR: 8237908: [TESTBUG] [macos] Add support to jtreg helpers to unpack pkg packages

[Andy Herrick]

looks good.

/Andy

On 5/21/2020 4:16 AM, alexander.matveev at oracle.com wrote:
> Please review the jpackage fix for bug [1] at [2].
>
> - Added support for unpacking pkg.
>
> [1] https://bugs.openjdk.java.net/browse/JDK-8237908
>
> [2] http://cr.openjdk.java.net/~almatvee/8237908/webrev.00/
>
> Thanks,
> Alexander