Fix Django 2.0 deprecation warnings

awx/sso/conf.py

@@ -4,7 +4,7 @@ import urllib.parse as urlparse
 
 # Django
 from django.conf import settings
-from django.core.urlresolvers import reverse
+from django.urls import reverse
 from django.utils.translation import ugettext_lazy as _
 
 # Django REST Framework

awx/sso/views.py

@@ -6,7 +6,7 @@ import urllib.parse
 import logging
 
 # Django
-from django.core.urlresolvers import reverse
+from django.urls import reverse
 from django.http import HttpResponse
 from django.views.generic import View
 from django.views.generic.base import RedirectView