Add const to many places

This follows !301 in core

include/laser/processor/processor_closeloop_icp.h

@@ -45,7 +45,7 @@ class ProcessorCloseLoopICP : public ProcessorBase
 
         virtual void process(CaptureBasePtr _capture_ptr) override;
 
-        virtual bool voteForKeyFrame() override;
+        virtual bool voteForKeyFrame() const override;
 
         static ProcessorBasePtr createAutoConf(const std::string& _unique_name, const ParamsServer& _server, const SensorBasePtr sensor_ptr);