Deprecate/Restore RegisteredService properties

Deals with https://github.com/Jasig/cas/issues/775

These are some fields that were previously removed from the registered service model. They are now restored and deprecated, which allow the management webapp to also function without any errors. 
there's no way to determine what this should return based on the new preferred attribute?  If we're adding these back to basically lie about the response is it not better to just fix the thing referring to them since we didn't properly deprecate them to begin with?