RFR: 8250646: hdiutil detach fix JDK-8245311 still fails sometimes

[Andy Herrick]

looks good to me

/Andy

On 7/30/2020 8:10 PM, alexander.matveev at oracle.com wrote:
> Please review the jpackage fix for bug [1] at [2].
>
> - DMG image can get detach even if "hdiutil detach" return resource 
> busy error. Fixed by stopping trying detach if DMG already got detach.
>
> [1] https://bugs.openjdk.java.net/browse/JDK-8250646
> [2] http://cr.openjdk.java.net/~almatvee/8250646/webrev.00/
>
> Thanks,
> Alexander