Always pass an owner when spying on unbound methods.
Review Request #10596 — Created June 17, 2019 and submitted
Modern versions of kgb recommend passing an
spying on unbound methods. This is to ensure compatibility with Python
3.x, which doesn't have a specific concept of an unbound method
(they're just standard functions). Not passing an explicit owner can
cause spies to conflict or to stay registered past the end of a test on
This change updates all our spies on unbound methods to specify an
Unit tests pass.