CORD-1010 refactor openstack synchronizer to use new_base

Change-Id: I4eb4e5131275faf69e1da05efc81a3d8d0d12296
diff --git a/xos/synchronizer/model_policies/model_policy_User.py b/xos/synchronizer/model_policies/model_policy_User.py
index 8d14244..cc37db1 100644
--- a/xos/synchronizer/model_policies/model_policy_User.py
+++ b/xos/synchronizer/model_policies/model_policy_User.py
@@ -1,7 +1,6 @@
-def handle(user):
-    from core.models import Controller, ControllerSite, ControllerUser, User
-    from collections import defaultdict
+from synchronizers.new_base.modelaccessor import *
 
+def handle(user):
     # user = User.get(user_id)
     
     controller_users = ControllerUser.objects.filter(user=user)