The main problem was that during initial negotiation the client would
request the gimbal_manager_information from px4 but px4 would never send
it because in this configuration the device_compid was set to 0.
When requesting a message from a stream that is not active we start the
stream with interval=0 and call the request method once. For all streams
this works fine except the gps_global_origin. For this one the request method
is actually overidden to throttle down the rate and not just send out the message.
This will cause this message to never being sent on request if the stream
is not active by default.
This is a corner case that happens when the user wants to command an
altitude change just after a takeoff. Takeoff doesn't set the current
lat and lon therefore the user had to change altitude twice to get it working.
The first time to set the current lat and lon and the second time to
actually change altitude.
Before this check we were free to fly outside of a geofence with a goto
command. With this check we ignore the command if the location of the goto
is outside the fence. If this is the case we send back a mavlink warning to
the ground station.
