moltres: various fixes so it works properly again
moltres: various fixes so it works properly again

Add get_content_stream to the model not to the properties, this
caused it to break while it was constructing the model object.

Add a license to the properties so the articles can actually
be openened, otherwise it would break on trying to get the
license file.

https://phabricator.endlessm.com/T12380

endlessm/eos-knowledge-lib,endlessm/eos-knowledge-lib,endlessm/eos-knowledge-lib,endlessm/eos-knowledge-lib