Broker refactor - final tweak

[mhidas]

I tried to update some of the moorings handlers in aodndata to work with this. It failed when I tried to add an existing URL (not local path) as a deletion, like this (code is here, but now updated):

                self.add_to_collection(old_product_url, dest_path=old_product_url,
                                       is_deletion=True, late_deletion=True,
                                       publish_type=PipelineFilePublishType.DELETE_UNHARVEST)

I specified it as is_deletion, because that's what the arg is called everywhere, except PipelineFileCollection.add(), which was calling it deletion. So let's make it consistent.

And while I'm at it, let's bump the version number?