Refs #17209 -- Added LoginView and LogoutView class-based views

Thanks Tim Graham for the review.

tests/resolve_url/tests.py

@@ -1,12 +1,12 @@
 from __future__ import unicode_literals
 
-from django.contrib.auth.views import logout
 from django.shortcuts import resolve_url
 from django.test import SimpleTestCase, override_settings
 from django.urls import NoReverseMatch, reverse_lazy
 from django.utils import six
 
 from .models import UnimportantThing
+from .urls import some_view
 
 
 @override_settings(ROOT_URLCONF='resolve_url.urls')
@@ -53,25 +53,25 @@ class ResolveUrlTests(SimpleTestCase):
         Tests that passing a view function to ``resolve_url`` will result in
         the URL path mapping to that view name.
         """
-        resolved_url = resolve_url(logout)
-        self.assertEqual('/accounts/logout/', resolved_url)
+        resolved_url = resolve_url(some_view)
+        self.assertEqual('/some-url/', resolved_url)
 
     def test_lazy_reverse(self):
         """
         Tests that passing the result of reverse_lazy is resolved to a real URL
         string.
         """
-        resolved_url = resolve_url(reverse_lazy('logout'))
+        resolved_url = resolve_url(reverse_lazy('some-view'))
         self.assertIsInstance(resolved_url, six.text_type)
-        self.assertEqual('/accounts/logout/', resolved_url)
+        self.assertEqual('/some-url/', resolved_url)
 
     def test_valid_view_name(self):
         """
         Tests that passing a view name to ``resolve_url`` will result in the
         URL path mapping to that view.
         """
-        resolved_url = resolve_url('logout')
-        self.assertEqual('/accounts/logout/', resolved_url)
+        resolved_url = resolve_url('some-view')
+        self.assertEqual('/some-url/', resolved_url)
 
     def test_domain(self):
         """