JCE providers as services

[Sean Mullan]

Thanks. Here are a couple of issues I have run into so far with 
converting JCE Providers to modular services:

1. Some Providers take an optional String argument, i.e. they can define 
a Provider(String) constructor. Not sure how to workaround that one yet.

2. The order of the returned providers is important and is based on the 
java.security configuration file. This one I can probably workaround by 
changing the internal provider lookup code to reorder the Providers 
returned by ServiceLoader.iterator().

--Sean