update the network configuration list

when changes in the networks happen.

Task-number: QTBUG-34021

Change-Id: I2bd187e7d04d6876294f18d917c9a384afe5db35
Reviewed-by: Robin Burchell <robin+qt@viroteck.net>
fix connman QNetworkConfiguration Discovered

Make Discovered depend on autoconnectable service

This stops seemingly automatic use of a non autconnectable service,
and allows the connection dialog to popup.

Change-Id: Idea9a22eb4bbfb4fefeca7867526a2ddc3954376
Reviewed-by: Robin Burchell <robin+qt@viroteck.net>
make 'AlwaysAsk' if found help determine whether the configuration is Discovered or not.

Since bearer has no idea about user interaction, we just do this,
and make the roaming/always ask scenario unavailable.

Change-Id: Id509a4d3346cdbb9367ddb465364c3500fc62fdf
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
Reviewed-by: Robin Burchell <robin+qt@viroteck.net>