ansible-test only passes files which have the .py suffix for sanity
tests on python files. This change will allow sanity tests to run on
the Python files in hacking/
* Rename test-module to test-module.py
* Symlink test-module for backwards compat since end users may be using
test-module
* Fix test-module sanity errors that are now triggered
* Rename ansible_profile to ansible-profile.py
* Rename build-ansible
* standardize user/password connection vars
* docs: use ansible_user and ansible_password
* docs: var precedence for connection vars
* docs: ansible_become_pass -> ansible_become_password etc
