CP-44106: Do not clear interface_order in networkdb

When xapi start, networkd config will be reset, see
Xapi_pif.start_of_day_best_effort_bring_up. In fact,
the interface_order is only maintained by networkd,
it shouldn't be cleared.

Signed-off-by: Changlei Li <[email protected]>

Author: changlei-li

ocaml/networkd/bin/network_server.ml

@@ -111,7 +111,9 @@ let on_timer () = write_config ()
 
 let clear_state () =
   write_lock := true ;
-  config := Network_config.empty_config
+  (* Do not clear interface_order, it is only maintained by networkd *)
+  config :=
+    {Network_config.empty_config with interface_order= !config.interface_order}
 
 let sync_state () =
   write_lock := false ;