When we were logging every failed query from ES, it was apparent most of the failures were happening on MLT calls for getting Related Articles on KB article pages. Let's add some logging calls so we can find troubleshoot the issue.
PR: https://github.com/mozilla/kitsune/pull/1041 Landed in: https://github.com/mozilla/kitsune/commit/4d7583d9ad938302c9609056bb5c91c2fe94e140. I can't push this right now, because SVN is still down.
Deployed to prod now.