fix args' name to be consistent with the framework.

Change-Id: Idc23ef3bacfd7678e780b976d042d18389a0bf35
Reviewed-on: http://gerrit.aldebaran.lan/43116
Tested-by: goreal <goreal@aldebaran-robotics.com>
Reviewed-by: goreal <goreal@aldebaran-robotics.com>