[8u20] Request for approval: 7152892 - some jtreg tests fail with permission denied

[Rob McKenna]

Straightforward backport of a simple jdk9 test fix.

Bug: https://bugs.openjdk.java.net/browse/JDK-7152892
Changeset: hg.openjdk.java.net/jdk9/dev/jdk/rev/782d1a32516e
Review: 
http://mail.openjdk.java.net/pipermail/core-libs-dev/2014-February/024943.html

     -Rob