Support OC4.1 deployment

- set 4.1 as symlink to 4.0 files (most of the files are the same)
- separate folder for kafka configs
- separate folder for cassandra configs

Change-Id: Idff16070e4e5f887f320a6d3d8228213f2eededb
Related-PROD: PROD-24913
diff --git a/_modules/contrail.py b/_modules/contrail.py
index 777c686..c9741e3 100644
--- a/_modules/contrail.py
+++ b/_modules/contrail.py
@@ -702,7 +702,7 @@
     vnc_client = _auth(**kwargs)
     vrouter_conf_objs = vnc_client._objects_list('global-vrouter-config', detail=True)
     for vrouter_conf_obj in vrouter_conf_objs:
-        ret[vrouter_conf_obj._display_name] = vrouter_conf_obj.__dict__
+        ret[vrouter_conf_obj.name] = vrouter_conf_obj.__dict__
     return ret