[bugfix] Properly loaded the module

python/display.py

 import sys
 
-from unittest_utils import loadHyQ, loadICub, loadTalos, loadTalosArm, loadTiago, loadTiagoNoHand
+from example_robot_data import loadHyQ, loadICub, loadTalos, loadTalosArm, loadTiago, loadTiagoNoHand
 
 sys.path.append('/opt/openrobots/share/example-robot-data/unittest/')