Make a few cleanups:
- Remove python 2.7 stanza from setup.py
- Add requires on python >= 3.6 to setup.cfg so that pypi and pip
know about the requirement
- Remove obsolete sections from setup.cfg
- Update classifiers
- Update requirements, no need for python_version anymore
- Switch to apidoc instead of autodoc for API docs, use sphinx-build.
Change-Id: Ie6107bc80961a7306957b17ac2eda44417b53d3e
OpenStack is often used with dustributions of GNU/Linux
which use python-2.6 as a default python interpreter.
Other OpenStack projects declare compatibility with python-2.6.
Ironic is been continuously tested for compatibility with
python-2.6 so we must declare this in the classifier to
stay synced with other OpenStack services.
Change-Id: Idf296e925c39d2847e7c8d7bfca073b5f9681754
Andreas Jaeger