Add support for containers; add tests for List w/ and w/o duplicated values

Add test for Map

…or with -p=predefined=true

…tracking is not required

I removed it from the traditional VF for now as I would like us to focus
on the case where it is useful first.

We will reintroduce it later once we have validated the approach where
it is the most useful.

I'm a bit unclear right now if we should use the same contract for
traditional and predefined scope VF as we are dealing with different
things and they won't be evaluated at the same moment.

I'm thinking that maybe this needs to be a different contract.

This contract allows to override the default bean process tracking
behavior without exposing our internal structures.

It needs a bit more love on the config side so that we can define it via
XML too and some documentation.