Pass admin.site.urls directly to url()
Pass admin.site.urls directly to url()

This fixes the deprecated warning "Passing a 3-tuple to
django.conf.urls.include() is deprecated." per [1].

[1] https://docs.djangoproject.com/en/1.11/releases/1.9/#passing-a-3-tuple-or-an-app-name-to-include

Signed-off-by: Shu Shen <440c109a8f67b6bb438c7a645596c4185b792b55@gmail.com>

melinath/django-graph-api,melinath/django-graph-api