ft-lambda: handle generic types

[lalmeras]

Current behavior: when target type is generic, we use plain old inner binding classes.

We should move to lambda expressions.

Two cases must be handled:

• raw type; binding to a private Map field; for example
• anonymous constrained type; binding to a private Map<? extends K, V> or private Map<K, ? extends K> field or private Map<? extends K, ? extends V> field
• anonymous unconstrained type; binding to a private Map<?, V> or private Map<K, ?> field or private Map<?, ?> field

For raw type, we need to build a custom TypeRawBindingPath<R, P, T> extends AbstractBinding<R, P, T, Type> as a binding base class.

Not sure if constrained and unconstrained types are really different cases.