Add django constance to thirdpart to void dependency

thirdpart/constance/apps.py

@@ -0,0 +1,7 @@
+from django.apps import AppConfig
+from django.utils.translation import ugettext_lazy as _
+
+
+class ConstanceConfig(AppConfig):
+    name = 'constance'
+    verbose_name = _('Constance')