Fixed #26013 -- Moved django.core.urlresolvers to django.urls.

Thanks to Tim Graham for the review.

tests/generic_views/views.py

@@ -2,7 +2,7 @@ from __future__ import unicode_literals
 
 from django.contrib.auth.decorators import login_required
 from django.core.paginator import Paginator
-from django.core.urlresolvers import reverse, reverse_lazy
+from django.urls import reverse, reverse_lazy
 from django.utils.decorators import method_decorator
 from django.views import generic