Add a base organization test case class.

mayan/apps/organizations/tests/base.py

@@ -0,0 +1,15 @@
+from __future__ import unicode_literals
+
+from django.test import TestCase
+
+from ..models import Organization
+from ..utils import create_default_organization
+
+
+class OrganizationTestCase(TestCase):
+    def setUp(self):
+        create_default_organization()
+
+    def tearDown(self):
+        Organization.objects.all().delete()
+        Organization.objects.clear_cache()