fix license headers (must be GPLv2 only)

...API/components/moved_to_robotcomponents_RobotIK/RobotIK.h

...nts/moved_to_robotcomponents_RobotIK/test/RobotIKTest.cpp

..._to_robotcomponents_RobotIK/test/RobotIKTestEnvironment.h

source/RobotAPI/components/units/BusInspectionUnit.cpp

source/RobotAPI/components/units/BusInspectionUnit.h

source/RobotAPI/components/units/ForceTorqueObserver.cpp

source/RobotAPI/components/units/ForceTorqueObserver.h

source/RobotAPI/components/units/ForceTorqueUnit.cpp

source/RobotAPI/components/units/ForceTorqueUnit.h

...e/RobotAPI/components/units/ForceTorqueUnitSimulation.cpp

source/RobotAPI/components/units/ForceTorqueUnitSimulation.h

source/RobotAPI/components/units/HandUnit.cpp

source/RobotAPI/components/units/HandUnit.h

source/RobotAPI/components/units/HandUnitSimulation.cpp

source/RobotAPI/components/units/HandUnitSimulation.h

source/RobotAPI/components/units/HapticObserver.h

source/RobotAPI/components/units/HapticUnit.cpp

source/RobotAPI/components/units/HapticUnit.h

source/RobotAPI/components/units/HeadIKUnit.h

source/RobotAPI/components/units/InertialMeasurementUnit.cpp