[PATCH] settings: Use environment variables by default

[Finucane, Stephen]

On 14 Feb 16:30, Stephen Finucane wrote:
> The Django documentation suggests using environment variables as a way
> to allow devs to commit settings files via source control without
> including confidential information therein [1]. As such, change the
> provided 'production' settings to do this. This should promote best
> practices while also ensuring provisioning tools like
> 'ansible-django-stack' [2] work as expected.
> 
> [1] https://docs.djangoproject.com/en/1.9/howto/deployment/checklist/
> [2] https://github.com/jcalazan/ansible-django-stack
> 
> Signed-off-by: Stephen Finucane <stephen.finucane at intel.com>

Merged.