Multiple input files to the service (separated from RE: idpv3 first look)

[Tom Zeller]

> I'll play around with the change I suggested for the filter manager and if
> that works I'll do the same for the other Serviceable classes.

What's the "filter manager", is that the to-be-written Function passed
to the ReloadableSpringService to assemble the AttributeFilterImpl
from the ApplicationContext ?

I think you already know this Rod, but to support multiple
configuration files, I think the AttributeFilterPolicyGroupParser will
not be able to return an AttributeFilterImpl via getBeanClass(), and I
think the javadoc for AttributeFilterPolicyGroupParser should be
updated because it seems to date from when we had an
AttributerFilterService, whose job was to assemble the
AttributeFilterImpl from the ApplicationContext. Which it seems is
what we will want now to support multiple configuration resources :-)

We got rid of the AttributeFilterService and AttributeResolverService,
but to support multiple configuration files I think we'll need that
functionality back, if in the form of a
Function<GenericApplicationContext, ServiceableComponent> strategy,
that seems fine.