fix license headers (must be GPLv2 only)

source/RobotAPI/components/units/InertialMeasurementUnit.h

...botAPI/components/units/InertialMeasurementUnitObserver.h

source/RobotAPI/components/units/KinematicUnit.cpp

source/RobotAPI/components/units/KinematicUnit.h

source/RobotAPI/components/units/KinematicUnitObserver.cpp

source/RobotAPI/components/units/KinematicUnitObserver.h

source/RobotAPI/components/units/KinematicUnitSimulation.cpp

source/RobotAPI/components/units/KinematicUnitSimulation.h

source/RobotAPI/components/units/PlatformUnit.cpp

source/RobotAPI/components/units/PlatformUnit.h

source/RobotAPI/components/units/PlatformUnitObserver.cpp

source/RobotAPI/components/units/PlatformUnitObserver.h

source/RobotAPI/components/units/PlatformUnitSimulation.cpp

source/RobotAPI/components/units/PlatformUnitSimulation.h

source/RobotAPI/components/units/SensorActorUnit.cpp

source/RobotAPI/components/units/SensorActorUnit.h

source/RobotAPI/components/units/TCPControlUnit.cpp

source/RobotAPI/components/units/TCPControlUnit.h

source/RobotAPI/components/units/TCPControlUnitObserver.cpp

source/RobotAPI/components/units/TCPControlUnitObserver.h