CAS-1378: Make 1.0 validation use attribute setting in service registry.

https://issues.jasig.org/browse/CAS-1378

The CAS 1.0 validation does not respect the setting in the service registry. Since I’m afraid that we may actually have some old hacks that are using 1.0 validation, I have to modify this view in order to use this feature, and I wonder if this really shouldn’t be the default behavior? It is a minor change.