turn off for debug FitTracks and enable new SearchTrackCandidates()

-            _trackFitter->FitTracks( );
+ //            _trackFitter->FitTracks( );
+            _trackFitter->SearchTrackCandidates( );

add printout for Utility::GuessSensorID method .vs. geo::getSensorID

both cast hits into IMPL::TrackerHitIMPL or EVENT::TrackerHit
the result output is identical