CA-420856: Re-read inventory file when resetting network (#6789)

Before resetting, the inventory file is probably updated. For example,
during pool.eject, the "MANAGEMENT_INTERFACE" will be set to"".

Re-reading the inventory file here can avoid reading stale data.

Author: minglumlu

ocaml/networkd/bin/network_server.ml

@@ -212,6 +212,7 @@ let reset_state () =
           ) ;
         None
   in
+  Inventory.reread_inventory () ;
   config := Network_config.read_management_conf reset_order
 
 let set_gateway_interface _dbg name =