ext torques and estimated ext forces have wrong sign!

we have realized that the reported external torques and also the estimated external forces have the wrong sign!

their absolute values are correct, its only the sign of each component that is wrong.

we will not fix this, as teams might have adopted their solutions to those wrong signs!

this error has effects on

• the topic /euroc_c2_interface_node/telemetry.measured.external_torque,
• the service /euroc_c2_interface_node/get_estimated_external_forces.response.external_force and
• the service /euroc_c2_interface_node/set_stop_conditions when using a StopCondition with a condition_operator of "<" or ">"

up to now no team seemed to have a problem with this and we don't want to create new problems by fixing this now.

we apologize for this confusion!