Protobuf partial paths aren't expanded during

[eliax1996]

What happened?

The new parser implementation enabled the Protobuf parser to accept also files with non-fully specified path. Unfortunately we don't have a process of normalization of the protobuf schema, so basically we aren't managing correctly the schema evolution for the import reordering, the partial path shrinking or expansion.
I've created this draft containing a set of tests that the schema evolution part for protobuf should pass to be considered correct