Request for review (S) 7009828: Fix for 6938627 breaks visualvm monitoring when -Djava.io.tmpdir is defined

[Coleen Phillimore]

Summary: Change get_temp_directory() back to /tmp and %TEMP% like it 
always was and where the tools expect it to be.

There is more information in the bug, but essentially changing 
get_temp_directory() to use java.io.tmpdir breaks a lot of things.

open webrev at http://cr.openjdk.java.net/~coleenp/7009828/
bug link at http://bugs.sun.com/view_bug.do?bug_id=7009828

Thanks,
Coleen