Update URLs to Django 1.8+ style

Django 1.8 altered and deprecated the existing pattern for defining
URLs. This will be removed in 1.10, meaning that many deprecation
warnings show up under Django 1.9. We should fix the URLs promptly to
avoid logspam, and to support Django 1.10 in Newton.

See
https://docs.djangoproject.com/en/1.9/releases/1.8/#django-conf-urls-patterns

Change-Id: I074d20850de59bfe678a3bc72e9f0f25bd743cbf
Partially-Implements: blueprint dj110

horizon/test/test_dashboards/cats/kittens/urls.py

@@ -10,12 +10,10 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from django.conf.urls import patterns
 from django.conf.urls import url
 
 from horizon.test.test_dashboards.cats.kittens.views import IndexView  # noqa
 
-urlpatterns = patterns(
-    '',
+urlpatterns = [
     url(r'^$', IndexView.as_view(), name='index'),
-)
+]

horizon/test/test_dashboards/cats/tigers/urls.py

@@ -10,12 +10,10 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from django.conf.urls import patterns
 from django.conf.urls import url
 
 from horizon.test.test_dashboards.cats.tigers.views import IndexView  # noqa
 
-urlpatterns = patterns(
-    '',
+urlpatterns = [
     url(r'^$', IndexView.as_view(), name='index'),
-)
+]

horizon/test/test_dashboards/dogs/puppies/urls.py

@@ -10,14 +10,12 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from django.conf.urls import patterns
 from django.conf.urls import url
 
 from horizon.test.test_dashboards.dogs.puppies.views import IndexView  # noqa
 from horizon.test.test_dashboards.dogs.puppies.views import TwoTabsView  # noqa
 
-urlpatterns = patterns(
-    '',
+urlpatterns = [
     url(r'^$', IndexView.as_view(), name='index'),
     url(r'^tabs/$', TwoTabsView.as_view(), name='tabs'),
-)
+]