RFR[9] 8062731: Cipher object can be created without calling Cipher.getInstance

[Valerie Peng]

Hi Brad,

Would you have time to review this? I changed the code to base the trust 
decision on the immediate caller of Cipher(CipherSpi, Provider, String). 
In addition, the specified Provider object is only taken into account 
when it shares the same origin (codebase or module) with the caller.

Webrev: http://cr.openjdk.java.net/~valeriep/8062731/webrev.00/

Thanks,

Valerie