CORD-2352: Fix intermittent out-of-order executions in EPC

Change-Id: Ib05d31e8a4c5464f1e6dbf21c938ee409b7b682f
diff --git a/xos/synchronizer/model_policies/model_policy_vepcserviceinstance.py b/xos/synchronizer/model_policies/model_policy_vepcserviceinstance.py
index a5d46fa..ff7c836 100644
--- a/xos/synchronizer/model_policies/model_policy_vepcserviceinstance.py
+++ b/xos/synchronizer/model_policies/model_policy_vepcserviceinstance.py
@@ -89,6 +89,7 @@
         s = si_class(owner=service, name='epc-%s-%d' %
                      (si.lower(), self.obj.id))
         s.master_serviceinstance = self.obj
+        s.no_sync = True
         s.save()
 
         self.configure_service_instance(s)
@@ -154,8 +155,6 @@
             k = node['name']
             networks = node.get('networks', [])
             instance = self.create_service_instance_with_networks(k, networks)
-            instance.no_sync = True
-            instance.save()
 
             service_instances.append(instance)