kgb is getting a handful of changes to improve signature consistency and

compatibility across Python versions. As part of this, Review Board's

test suite needs a few changes.
Some fake functions passed when creating spies had incompatible function

signatures, which kgb is now strict about. Those have been updated

accordingly.
Some older tests were checking the args and kwargs of a spy call

directly, which failed due to how kgb is now storing this data. Those

have been replaced with called_with() statements instead.

Unit tests pass with the new kgb.