Message 368467 - Python tracker

> There are more MultiLoopWatcher tests which hang randomly, it's not only test_close_kill_running().

What other MultiLoopWatcher tests are currently having random hangs? From searching "MultiLoopWatcher" on bpo, I'm only finding this issue. For now, I'll just work on a PR to temporarily skip `test_close_kill_running()` until we can find a fix.