RFR: 8210838: Override javax.crypto.Cipher.toString()

[Seán Coffey]

A simple enhancement to override toString() for javax.crypto.Cipher class

https://bugs.openjdk.java.net/browse/JDK-8210838
webrev : http://cr.openjdk.java.net/~coffeys/webrev.8210838/webrev/

regards,
Sean.