[7u6] RFR: 7162043: Add headless mode tests to problem list [macosx]

[Michael McMahon]

This change is to add a number of tests to the Problem list for mac os.
Most of them are for issues related to running AWT remotely
which requires specific environment variables to be set
(or the headless mode selected). Long term, most of the tests should
probably just run in headless mode on all platforms. But, I just need
to stop them being run on Mac OS X for the moment

There are a handful of other issues in there as well, with CRs associated.

http://cr.openjdk.java.net/~michaelm/7162043/webrev.1/

Thanks
Michael