[9] RFR 8035166: Remove dependency on EC classes from pkcs11 provider

[Valerie Peng]

Vinnie,

Could you please help reviewing this change?

My current approach is to minimize code changes/refactoring - move the 
ECParameters, NamedCurve, CurveDB classes to sun.security.util package 
and then change the depending classes to use sun.security.util.XXX 
rather than sun.security.ec.XXX.

Besides moving the 3 classes, I also changed some methods to public to 
be accessible from sun.security.ec package.

webrev: http://cr.openjdk.java.net/~valeriep/8035166/webrev.00/

Thanks,
Valerie