AR is aborted when ApplicationReady of Plug sequence states "no submodule" for the plugged submodule

When a submodule is plugged in an IO Device, this is indicated to the IO Controller via a Plug Alarm. If handling the alarm takes some time and involves e.g. sending parameter records and parameter end and the submodule is pulled again before the application ready has been sent, the application ready of the plug sequence will contain a module diff with "no submodule". The controller aborts the AR in that case.

It is expected that the controller accepts such an sequence an markes the submodule internally as "no submodule" again.