* Return an extra oauth2 auth code during onboarding
* Areas in const
* Add integration step
* Lint
* Fix tests
* Fix test
* Verify integration added to done
* Verify step is marked as done
* Addded support for private storage.
Include 'private' flag parameters to the Store class and save_json function.
Updated various authentication and onboarding classes to use private stores.
Fixed unit test for emulated_hue which used a mock patch on save_json().
* Fixed Hound formatting issues not detected by local linting.