[jdk7u-dev] Request for approval for 7092627: use agentvm mode instead of samevm in regtests

[Alan Bateman]

This is a request to switch the jtreg execution mode from samevm to 
agentvm when running the jdk tests via the make files.

CR: http://bugs.sun.com/view_bug.do?bug_id=7092627

This has been in jdk8 for some time, thanks to Max:

http://hg.openjdk.java.net/jdk8/jdk8/jdk/rev/daf87c7be6a1

The changes for 7u are the same although the patch isn't identical due 
to other changes in jdk8:

Webrev: http://cr.openjdk.java.net/~alanb/7092627-7u/webrev/

Thanks,
Alan.