CORD-1244 Modify model_policies for OpenStack synchronizer

Change-Id: I8e946e3ca665689bd0449b80d87fe4bb29afde99
diff --git a/xos/synchronizer/model_policies/model_policy_SlicePrivilege.py b/xos/synchronizer/model_policies/model_policy_SlicePrivilege.py
index f4fab58..428c7e3 100644
--- a/xos/synchronizer/model_policies/model_policy_SlicePrivilege.py
+++ b/xos/synchronizer/model_policies/model_policy_SlicePrivilege.py
@@ -1,15 +1,22 @@
 from synchronizers.new_base.modelaccessor import *
+from synchronizers.new_base.policy import Policy
 
-def handle(slice_privilege):
-    # slice_privilege = SlicePrivilege.get(slice_privilege_id)
-    # apply slice privilage at all controllers
-    controller_slice_privileges = ControllerSlicePrivilege.objects.filter(
-        slice_privilege = slice_privilege,
-        )
-    existing_controllers = [sp.controller for sp in controller_slice_privileges]
-    all_controllers = Controller.objects.all()
-    for controller in all_controllers:
-        if controller not in existing_controllers:
-            ctrl_slice_priv = ControllerSlicePrivilege(controller=controller, slice_privilege=slice_privilege)
-            ctrl_slice_priv.save()  
+class SlicePrivilegePolicy(Policy):
+    model_name = "SlicePrivilege"
+
+    def handle_create(self, slice_privilege):
+        return self.handle_update(slice_privilege)
+
+    def handle_update(self, slice_privilege):
+        # slice_privilege = SlicePrivilege.get(slice_privilege_id)
+        # apply slice privilage at all controllers
+        controller_slice_privileges = ControllerSlicePrivilege.objects.filter(
+            slice_privilege = slice_privilege,
+            )
+        existing_controllers = [sp.controller for sp in controller_slice_privileges]
+        all_controllers = Controller.objects.all()
+        for controller in all_controllers:
+            if controller not in existing_controllers:
+                ctrl_slice_priv = ControllerSlicePrivilege(controller=controller, slice_privilege=slice_privilege)
+                ctrl_slice_priv.save()