Manual fix to issue#287 for Hironx.

Applying the change suggested in https://github.com/start-jsk/rtmros_hironx/issues/287#issuecomment-64893372 for left and right arms. 
As far as checked visually (making unittest for this issue is in progress at https://github.com/tork-a/rtmros_nextage/pull/133), it looked ok.