Remove django 2.0 from allowable failures in CI
Remove django 2.0 from allowable failures in CI

jpadilla/django-rest-framework,tomchristie/django-rest-framework,kgeorgy/django-rest-framework,kgeorgy/django-rest-framework,jpadilla/django-rest-framework,tomchristie/django-rest-framework,kgeorgy/django-rest-framework,tomchristie/django-rest-framework,jpadilla/django-rest-framework