Fix deprecation warnings for Django 1.11 and Django 2.0.

Signed-off-by: Roberto Rosario <roberto.rosario.gonzalez@gmail.com>

mayan/apps/authentication/tests/test_views.py

@@ -3,8 +3,8 @@ from __future__ import absolute_import, unicode_literals
 from django.conf import settings
 from django.contrib.auth import get_user_model
 from django.core import mail
-from django.core.urlresolvers import reverse
 from django.test import override_settings
+from django.urls import reverse
 
 from common.tests import BaseTestCase
 from smart_settings.classes import Namespace