setting of globals values dependent on release

[Keith McGuigan]

Paul Hohensee wrote:
> I don't think we ever implemented it.  Xiaobin's the RE, I think (can't
> remember the bugid).  So far, there's no difference between jdk6 and
> jdk7 as far as the vm's concerned.  Have you found something?

Oh ok... I remember seeing some discussion about it, and I thought it 
was in.  I guess not.

Yes, we need to allow/disallow classfile version 51 for jdk7/jdk6 
respectively.

--
- Keith