8248248: [macos] EmptyFolderPackageTest.java fails EmptyFolderPackageTest-dmg-setup.scpt exited with 134 code

[alexander.matveev at oracle.com]

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

It is not clear why script was hanging for more than 7 minutes which 
caused test to timeout. Fixed by limiting script execution time to 3 
minutes. Also, EmptyFolderPackageTest was removed from ProblemList.

[1] https://bugs.openjdk.java.net/browse/JDK-8248248
[2] http://cr.openjdk.java.net/~almatvee/8248248/webrev.00/

Thanks,
Alexander