Various fixes and updates

- Remove redundant test-requirements and require horizon
  Note: This implies newer versions of django

- Use openstack_dashboard.test.helpers.TestCase
  To fix the following error with py3.
  TypeError: unhashable type: 'TestNeutron_taas_dashboard'

- Update uses of urlresolvers
  See: https://review.openstack.org/#/c/528497/

- Fix ImproperlyConfigured
  See: https://review.openstack.org/#/c/527323/

Change-Id: I60e983baff48cf5bab73c5e89f03b6984ef62417

neutron_taas_dashboard/dashboards/project/tapservices/tables.py

@@ -12,7 +12,7 @@
 #    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
 

neutron_taas_dashboard/dashboards/project/tapservices/tapflows/tables.py

@@ -12,7 +12,7 @@
 #    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
 

neutron_taas_dashboard/dashboards/project/tapservices/tapflows/views.py

@@ -12,7 +12,7 @@
 #    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

neutron_taas_dashboard/dashboards/project/tapservices/tapflows/workflows.py

@@ -12,7 +12,7 @@
 #    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.views.decorators.debug import sensitive_variables
 

neutron_taas_dashboard/dashboards/project/tapservices/urls.py

@@ -30,5 +30,5 @@ urlpatterns = [
     url(TAP_SERVICES % 'detail', views.DetailView.as_view(), name='detail'),
     url(TAP_SERVICES % 'tapflows/create', tf_views.CreateView.as_view(),
         name='createtapflow'),
-    url(r'^tapflows/', include(tapflow_urls, namespace='tapflows')),
+    url(r'^tapflows/', include((tapflow_urls, 'tapflows'))),
 ]

neutron_taas_dashboard/dashboards/project/tapservices/views.py

@@ -12,7 +12,7 @@
 #    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

neutron_taas_dashboard/dashboards/project/tapservices/workflows.py

@@ -12,7 +12,7 @@
 #    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.views.decorators.debug import sensitive_variables
 

neutron_taas_dashboard/test/base.py

@@ -13,9 +13,9 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-from oslotest import base
+from openstack_dashboard.test import helpers
 
 
-class TestCase(base.BaseTestCase):
+class TestCase(helpers.TestCase):
 
     """Test case base class for all unit tests."""

requirements.txt

@@ -8,10 +8,5 @@
 #
 # PBR should always appear first
 pbr>=2.0.0 # Apache-2.0
-# If python-higginsclient will be created, we will use it.
-#python-higginsclient>=0.1.0 # Apache-2.0
-Babel>=2.3.4 # BSD
-Django<1.9,>=1.8 # BSD
-django-babel>=0.5.1 # BSD
-django-compressor>=2.0 # MIT
-django-pyscss>=2.0.2 # BSD License (2 clause)
+horizon>=14.0.0 # Apache-2.0
+python-neutronclient>=6.7.0 # Apache-2.0

test-requirements.txt

@@ -9,21 +9,5 @@
 # Hacking should appear first in case something else depends on pep8
 hacking>=0.12.0,!=0.13.0,<0.14 # Apache-2.0
 #
-coverage>=3.6 # Apache-2.0
-django-nose>=1.2 # BSD
-mock>=2.0 # BSD
-mox3>=0.7.0 # Apache-2.0
-nodeenv>=0.9.4 # BSD License  # BSD
-nose # LGPL
-nose-exclude # LGPL
-nosehtmloutput>=0.0.3 # Apache-2.0
-nosexcover # BSD
-openstack.nose-plugin>=0.7 # Apache-2.0
-oslosphinx!=3.4.0,>=2.5.0 # Apache-2.0
-oslotest>=1.10.0  # Apache-2.0
-reno>=1.8.0 # Apache2
-selenium>=2.50.1 # Apache-2.0
-sphinx!=1.3b1,<1.3,>=1.2.1 # BSD
-testtools>=1.4.0 # MIT
-# This also needs xvfb library installed on your OS
-xvfbwrapper>=0.1.3 #license: MIT
+coverage!=4.4,>=4.0 # Apache-2.0
+mock>=2.0.0 # BSD