SEBA-324 reverse field numbers for manytoone relations

Change-Id: I1850fb8fba2d95db8219f7cf7786771be724c3f3
diff --git a/xos/synchronizer/models/openstack.xproto b/xos/synchronizer/models/openstack.xproto
index 9565da2..2b2a5cc 100644
--- a/xos/synchronizer/models/openstack.xproto
+++ b/xos/synchronizer/models/openstack.xproto
@@ -13,8 +13,8 @@
 message OpenStackServiceInstance (ComputeServiceInstance){
      option verbose_name = "OpenStack Service Instance";
 
-     optional manytoone flavor->Flavor:openstackinstance = 1 [null = True, db_index = True, blank = True, help_text = "Flavor of this instance"];
-     optional manytoone node->Node:openstackinstances = 2 [db_index = True, null = True, blank = True, help_text = "Node on which to deploy this instance"];
+     optional manytoone flavor->Flavor:openstackinstance = 1:1003 [null = True, db_index = True, blank = True, help_text = "Flavor of this instance"];
+     optional manytoone node->Node:openstackinstances = 2:1005 [db_index = True, null = True, blank = True, help_text = "Node on which to deploy this instance"];
 
      optional string admin_password = 3 [max_length = 200, content_type = "stripped", blank = True, help_text = "Admin password for instance", null = True, db_index = False];
 }