RFR: 8139859 :TestRSA.java: 'message larger than modulus' using SunRsaSign KeyFactory

[Anthony Scarpino]

Hi

I need a review of this test change that makes TestRSA.java work 
properly after the Preferred Provider code push.  I also added some 
extra testing to make sure it runs in more situations.

http://cr.openjdk.java.net/~ascarpino/8139859/webrev/

thanks

Tony