enable to test navigation in gazebo for pr2-ri-test

[k-okada]

Includes @knorth55 fix k-okada#17

• do not download gazebo models, it takes long time in first time, you can try by removing ~/.gazebo/models directory.

[k-okada]

@pazeshun did you write code something like ? if so please add PR.

(defmacro deftest (name &rest body)
  `(progn
     ;; its not cool...                                                         
     (defun ,name ()
       (let ((tm (instance mtimer :init)))
       (warning-message 3 "start testing [~A]~%" ',name)
       ,@body
       (warning-message 3 "done  testing [~A] ~A~%" ',name (send tm :stop))
       ))
     (send *unit-test* :add-function ',name)
     ',name))

done  testing [test-wait-interpolation] 48.5682
done  testing [test-start-grasp] 35.8941
done  testing [test-tuckle-arm] 91.5009
done  testing [test-wait-interpolation-after-stop-grasp] 3.09813
done  testing [test-arm-rotation] 400.834
done  testing [test-wait-interpolation-timeout] 150.474
done  testing [test-end-coords-interpolation] 28.9235

[pazeshun]

@pazeshun did you write code something like ? if so please add PR.

@k-okada Sorry, I just write print sentences inside each test...: ad33783