[9] code review request for 8130850: Support loading a keystore with a custom KeyStore.LoadStoreParameter class

[Vincent Ryan]

Please review this change to the implementation of the KeyStoreSpi.engineLoad 
method to accept custom KeyStore.LoadStoreParameter classes.
Thanks.

Bug: https://bugs.openjdk.java.net/browse/JDK-8130850
Webrev: http://cr.openjdk.java.net/~vinnie/8130850/webrev.00/