RFR 8131350: policytool can directly reference permission classes

[Weijun Wang]

Hi All

Please take a look at

    http://cr.openjdk.java.net/~weijun/8131350/webrev.00/

Policytool contains a lot of hard coded strings for permission class 
names, which can be changed to actual Class types. That allows checking 
at compile-time rather than failing at run-time if any name had a typo.

Noreg-cleanup.

Thanks
Max