Django 2.0 support

Horizon and most horizon plugins support Django 2.0 in Rocky.
This commit focuses on passing the unit tests with Django 2.0.
It would be nice if masakari-dashboard team tests it in
real environments.

Replace django.core.urlresolves with django.urls

(In Django 2.0) The django.core.urlresolvers module is removed
in favor of its new location, django.urls.
It was deprecated in Django 1.10:
https://docs.djangoproject.com/en/2.0/releases/1.10/#id3

Drops older Django unit tests from tox.ini
as horizon dropped Django <=1.10 support in Rocky.

Change-Id: I67907a2460f8472e5a6222210d74b3eed71be064

masakaridashboard/hosts/forms.py

@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from django.core.urlresolvers import reverse
+from django.urls import reverse
 from django.utils.translation import ugettext_lazy as _
 
 from horizon import exceptions

masakaridashboard/hosts/tables.py

@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from django.core.urlresolvers import reverse
+from django.urls import reverse
 from django.utils.translation import ugettext_lazy as _
 from django.utils.translation import ungettext_lazy
 

masakaridashboard/hosts/tests.py

@@ -13,7 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from django.core.urlresolvers import reverse
+from django.urls import reverse
 import mock
 
 from masakaridashboard.test import helpers as test

masakaridashboard/hosts/views.py

@@ -13,8 +13,8 @@
 # limitations under the License.
 
 from django.conf import settings
-from django.core.urlresolvers import reverse
-from django.core.urlresolvers import reverse_lazy
+from django.urls import reverse
+from django.urls import reverse_lazy
 from django.utils.translation import ugettext_lazy as _
 
 from horizon import exceptions

masakaridashboard/notifications/tests.py

@@ -13,8 +13,8 @@
 # limitations under the License.
 
 from django.conf import settings
-from django.core.urlresolvers import reverse
 from django.test.utils import override_settings
+from django.urls import reverse
 from django.utils.http import urlunquote
 import mock
 

masakaridashboard/notifications/views.py

@@ -13,7 +13,7 @@
 # limitations under the License.
 
 from django.conf import settings
-from django.core.urlresolvers import reverse
+from django.urls import reverse
 from django.utils.translation import ugettext_lazy as _
 
 from horizon import exceptions

masakaridashboard/segments/forms.py

@@ -13,7 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from django.core.urlresolvers import reverse
+from django.urls import reverse
 from django.utils.translation import ugettext_lazy as _
 
 from horizon import exceptions

masakaridashboard/segments/tables.py

@@ -13,7 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from django.core.urlresolvers import reverse
+from django.urls import reverse
 from django.utils.translation import ugettext_lazy as _
 from django.utils.translation import ungettext_lazy
 

masakaridashboard/segments/tests.py

@@ -16,8 +16,8 @@
 import mock
 
 from django.conf import settings
-from django.core.urlresolvers import reverse
 from django.test.utils import override_settings
+from django.urls import reverse
 from django.utils.http import urlunquote
 from openstack_dashboard.test import helpers
 

masakaridashboard/segments/views.py

@@ -14,8 +14,8 @@
 #    under the License.
 
 from django.conf import settings
-from django.core.urlresolvers import reverse
-from django.core.urlresolvers import reverse_lazy
+from django.urls import reverse
+from django.urls import reverse_lazy
 from django.utils.translation import ugettext_lazy as _
 
 from horizon import tables

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py35,py27,py27dj18,pep8
+envlist = py35,py27,pep8
 minversion = 2.0
 skipsdist = True
 
@@ -32,12 +32,6 @@ commands =
   coverage xml --omit '.tox/cover/*' -o 'cover/coverage.xml'
   coverage html --omit '.tox/cover/*' -d 'cover/htmlcov'
 
-[testenv:py27dj18]
-basepython = python2.7
-commands =
-    pip install django>=1.8,<1.9
-    {[testenv]commands}
-
 [testenv:eslint]
 whitelist_externals = npm
 commands =