Refine eventlogging pipeline should not refine data for domains that are not wikimedia's. It is not infrequent that other wikis like www.wikipedia-with-spam.org run a clone of our code and , as such, they endup running our instrumenting code and sending us their eventlogging events.

Those events should probably be dropped (ideally) before they get refined. This is somewhat related to: https://phabricator.wikimedia.org/T219162

and https://github.com/wikimedia/analytics-refinery/commit/58a03f623cd6124fd4de70cb8d7e739a90b58214