[Scanner only] Outgoing/originated connections are reported as "Connected" before the first IO frame from the slave is received

This issue relates to the packet EIP_OBJECT_CONNECTION_IND, which is sent to the application with state EIP_CONNECTED as soon as the forard open response is received from the slave device.

In the slave implementation, the indication is sent as soon as the first IO frame from the scanner is received. For the scanner implementation this should behave the same.