A few test classes were failing to call tearDown() of the superclass,
which meant the file descriptors of their replydata files were leaking.
Make sure to call it, and switch every other callsite of superclasses by
name to using argument-less super().
Revert an AllTests change that snuck in during release.
* Handle unicode strings when recording responses (#1253)
* Add new test requirements
* Make requirement conditional
* Fix flake8 error
* Compare dict values without worrying about key order
* Improve readability
Steve Kowalik