Replace ATF+Kyua with something lighter
The ATF suite is really heavyweight, and we are not really using it's full potential. Something simpler like C-TAP Harness could be used instead.
Requirements:
- Support for all our supported platforms (Linux, BSDs)
- Support for all our best-effort platforms (Windows, Solaris) (?)
- Support for mocking objects
- Support for catching assertions
- Output in Test Anything Protocol
- Output in xUnit/jUnit
- Active upstream development