request for code review for simple class file parser change (XXS)

[Keith McGuigan]

I think this ties the shortest possible code change, we simply update 
the max class file version in the parser to 51 from 50.  No other changes.

(This is to be able to run with classfiles generated by 'javac -target 
1.7', which so far only increments the class file version number).

http://webrev.invokedynamic.info/kamg/6695506/

Thanks!

--
- Keith