Various apps: Sort imports

Run imports as per Mayan EDMS best practices.

Signed-off-by: Roberto Rosario <Roberto.Rosario@mayan-edms.com>

mayan/apps/common/tests/test_api.py

@@ -1,7 +1,7 @@
 from __future__ import unicode_literals
 
-from django.urls import reverse
 from django.test import override_settings
+from django.urls import reverse
 
 from mayan.apps.rest_api.tests import BaseAPITestCase