pytest migration: rename TestControllerPytest back to TestController The name TestControllerPytest was introduced to allow a temporary situation where nose/unittest and pytest-based tests could coexist. This situation is now over, so the base test class can be renamed again.

# requirements.txt file for use as "pip install -r requirements.txt" as a
# readthedocs compatible alternative to "pip install -e ." which is a working
# alternative to "setup.py develop" which doesn't work with Mercurial 3.7
.