* 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
* use py3 instead of py34
* fixed test to test invalid enum
* ADDED: assign variable in the ctor with property setter to check validity if possible. CHANGE: move required property check to proper place. CHANGE: remove double quotes from allowed_values for none-string enum property
* rebuilt samples
* comment for improvement
* ADDED: post process enum model for python.
* comment
* rebuilt samples
* rebuilt samples