Utilize @FacesDataModel for existing DataModel wrappers

#1078 introduced a mechanism to register and lookup DataModel wrappers for (collection) types.

The components UIData and UIRepeat only utilize this mechanism as a "last resort". Meaning that a type that needs wrapping is first checked against a chain of types for which build-in wrappers are available. Only if none of these match is the @FacesDataModel mechanism consulted.

To have a more consistent model and most importantly allow overrides of build-in wrappers @FacesDataModel should always be consulted and there should be no build-in wrappers anymore.

Since this has backwards compatibility consequences, the best course of action may be to put this new behavior behind a switch and retain the old behavior as well.