Add unittest2 as a dependency and update kgb.
Review Request #12500 — Created Aug. 5, 2022 and updated
unittestlibrary contains a lot of useful functionality,
and some new names for older functions, none of which we can use with
This change brings in
unittest2as a dependency, using this as the
TestCaseon Python 2.
It also updates our
kgbdependency to the new 7.1 release.
Unit tests pass on Python 2 and 3.