Moved fake manager creation and initial configuration into the proxy generator (Part I)

This is the first part of PR #372 (we split it up into 2 PRs as mentioned there).

It solves #371 partially, namely that the default behavior is available inside the c'tor call. Therefore it also solves the bug #368 (see the `when_faking_a_class_which_calls_virtual_property_members_in_constructor` test case).
I like your suggested name. Will take it.
I think that this is just one scenario, namely no (virtual) method has been called, and has two consequences: initialized sink, but not (yet) fetched. BTW, this is also an argument for having 2 methods in `ILazyInterceptionSinkProvider`.