When motor power starts off we indicate it is on on the motor_power_active topic till a change

[mjstn]

It is currently unclear if this is a bug in firmware or motor_hardware.cc

Re-create: Start up the robot with motor power disabled. Result is topic motor_power_active indicates True only a couple publications after initially when it publishes False

This was seen with v43 firmware and may be a v43 bug but this issue is here till that is decided.