util stage: rename AntiBacklashStage to AntiBacklashActuator

the component is now generic enough that we can call it Actuator, as Stage is for
actuator restricted to X & Y.
Function for sem stream parameters update + code clean up
Merge branch 'kimon-MiniCalibration' of delmic-server.local:odemis into kimon-MiniCalibration
Merge branch 'kimon-MiniCalibration' of vpn.delmic.com:odemis into kimon-MiniCalibration