RFR: JDK-8247353: jtreg tests minor issues clean up

[Andy Herrick]

looks good.

/Andy

On 6/10/2020 12:21 PM, Alexey Semenyuk wrote:
> Please review fix [2] for jpackage bug [1].
>
> Minor jpackage jtreg tests clean up of issues uncovered during the 
> recent local test runs.
>
> - Alexey
>
> [1] https://bugs.openjdk.java.net/browse/JDK-8247353
>
> [2] http://cr.openjdk.java.net/~asemenyuk/8247353/webrev.00
>