Migrate from django-statsd-mozilla to django-statsd

[nikolas]

django-statsd-mozilla is unmaintained (https://pypi.org/project/django-statsd-mozilla/).

We're using some Graphite middleware in this package that provides timing information:

• GraphiteMiddleware
• GraphiteRequestTimingMiddleware

I think this functionality is included in the more current version of django-statsd:

• https://github.com/wolph/django-statsd/blob/master/django_statsd/middleware.py#L99

We'll just have to do some investigation, testing, and changes in our common statsd settings here in ctlsettings.