Client session does not detect disconnection from server if only publishing (no write operations)

[francois-normandin]

The Send Packet and Forward Packet methods should both verify connection status before sending bytes.

• Forward packets should return error 66 (disconnectdd by peer) if this occured.
• Send packets should return error 66 if disconnected by peer, but potentially other error code if disconnection occured from the client side.

[francois-normandin]

This is resolved with installation of MQTT Connection package 3.1.2