Update FeaturePosition to recent changes in Entity class.

CMakeLists.txt

@@ -54,4 +54,4 @@ ADD_SUBDIRECTORY(unitTesting)
 ADD_SUBDIRECTORY(doc)
 
 SETUP_PROJECT_FINALIZE()
-SETUP_PROJECT_CPACK()
\ No newline at end of file
+SETUP_PROJECT_CPACK()

src/dynamic_graph/sot/core/feature_position.py

@@ -49,7 +49,7 @@ class FeaturePosition (Entity):
             plug(signalPosition, self._feature.signal('position'))
         if signalJacobian:
             plug(signalJacobian, self._feature.signal('Jq'))
-        self._feature.signal('sdes').value = self._reference
+        self._feature.setReference(self._reference.name)
         self._feature.signal('selec').value = '111111'
         self._feature.frame('current')