RFR: 8236282: [macos] Find permanent solution to macOS test timeout problem JDK-8235738

[alexander.matveev at oracle.com]

Please review the jpackage fix for bug [1] at [2].

This is still a workaround for JDK-8236825. Implemented as per Roger 
suggestion to redirect output to temp file. I did a lot of testing using 
repro case and was not able to reproduce hang anymore.

[1] https://bugs.openjdk.java.net/browse/JDK-8236282
[2] http://cr.openjdk.java.net/~almatvee/8236282/webrev.01/

Thanks,
Alexander