RFR 8209416: Refactoring GetPropertyAction calls in JGSS

[Weijun Wang]

Please take a review at

   http://cr.openjdk.java.net/~weijun/8209416/webrev.00/

This is all about refactoring "AccessController.doPrivileged(new 
GetPropertyAction(x))" into "GetPropertyAction.privilegedGetProperty(x)".

I've already introduced a new GetBooleanAction::privilegedGetProperty method.

Noreg-cleanup.

Thanks
Max