ardupilotmega is not using icarous and uavionix modules when generated

[patrickelectric]

@laptou can you take a look ?

[patrickelectric]

It would be nice to have access to common and others messages that are included in ardupilotmega with:

pub fn get_apm_mount_status() -> mavlink::ardupilotmega::HEARTBEAT {
    mavlink::ardupilotmega::HEARTBEAT {
        custom_mode: 0,
        mavtype: mavlink::ardupilotmega::MavType::MAV_TYPE_QUADROTOR,
        autopilot: mavlink::ardupilotmega::MavAutopilot::MAV_AUTOPILOT_ARDUPILOTMEGA,
        base_mode: mavlink::ardupilotmega::MavModeFlag::empty(),
        system_status: mavlink::ardupilotmega::MavState::MAV_STATE_STANDBY,
        mavlink_version: 0x3,
    }
}

[patrickelectric]

Maybe is better to check the necessary includes in the xml and merge all in a big one to do the parse process.