CORD-1244 Modify model_policies for OpenStack synchronizer

Change-Id: I8e946e3ca665689bd0449b80d87fe4bb29afde99
diff --git a/xos/synchronizer/model_policies/model_policy_User.py b/xos/synchronizer/model_policies/model_policy_User.py
index 448b58f..79c0112 100644
--- a/xos/synchronizer/model_policies/model_policy_User.py
+++ b/xos/synchronizer/model_policies/model_policy_User.py
@@ -1,12 +1,19 @@
 from synchronizers.new_base.modelaccessor import *
+from synchronizers.new_base.policy import Policy
 
-def handle(user):
-    controller_users = ControllerUser.objects.filter(user_id=user.id)
-    existing_controllers = [cu.controller for cu in controller_users]
-    existing_controller_ids = [c.id for c in existing_controllers]
-    all_controllers = Controller.objects.all()
-    for controller in all_controllers:
-        if controller.id not in existing_controller_ids:
-            ctrl_user = ControllerUser(controller=controller, user=user)
-            ctrl_user.save()  
+class UserPolicy(Policy):
+    model_name = "User"
+
+    def handle_create(self, user):
+        return self.handle_update(user)
+
+    def handle_update(self, user):
+        controller_users = ControllerUser.objects.filter(user_id=user.id)
+        existing_controllers = [cu.controller for cu in controller_users]
+        existing_controller_ids = [c.id for c in existing_controllers]
+        all_controllers = Controller.objects.all()
+        for controller in all_controllers:
+            if controller.id not in existing_controller_ids:
+                ctrl_user = ControllerUser(controller=controller, user=user)
+                ctrl_user.save()