IvyMessagesInterface send_request not working as expected

[rafael1193]

The function IvyMessagesInterface.send_request is sending the agent name in the place of the message class.

A CONFIG request message is sent as IvyMessagesInterface 63240_1 CONFIG_REQ 200 instead of ground 63240_1 CONFIG_REQ 200

https://github.com/paparazzi/pprzlink/blob/f8e9822347ee2d306e30c4f675ac1897d28f3768/lib/v2.0/python/pprzlink/ivy.py#L295

should be replaced by

class_name, new_id, request_message.name, request_message.payload_to_ivy_string()