update :start-auto-balancer and :stop-auto-balancer method according to hrpsys-base trunk update at https://code.google.com/p/hrpsys-base/source/detail?r=1039  commit ;; we do not need to change usage of these methods
Merge pull request #396 from snozawa/update_methods_according_to_AutoBalancer_idl_update

update :start-auto-balancer and :stop-auto-balancer method