(sample6dofrobot_kalman_filter) : Update to use get and set KalmanFilterParam.
Merge pull request #389 from snozawa/update_st_codes

Calculate LPF parameter based on controller time step dt and enable to set cut-off frequency from IDL.
Merge pull request #390 from snozawa/update_sample6dof_kf_sample

Update to use get and set KalmanFilterParam
Merge remote-tracking branch 'origin/master' into refine_st_codes