[wizard_of_oz] Added ros service for requesting the object to the user.
[wizard_of_oz] Added ros service for requesting the object to the user.

ScazLab/baxter_collaboration,ScazLab/human_robot_collaboration,ScazLab/baxter_collaboration,ScazLab/baxter_collaboration,ScazLab/human_robot_collaboration,ScazLab/human_robot_collaboration,ScazLab/baxter_collaboration,ScazLab/human_robot_collaboration