* Remove trailing underscore in security_controller_.py and base_model_.py
* Regenerating sample files
* Clean-up files with trailing underscore in samples
* Update security extension to use the new security_controller
* Regenerate unmaintained samples
* Switches python generators to use pytest, useNose CLI option added if to allow nose to be used instead
* Adds ensure-up-to-date changes
* Adds setup.cfg to python clients so we can configure nose when useNose=true
* Adds fix for python-aiohttp testing, adds files missing from ensure-up-to-date
