Small cleanup of TrackBestTrackCreator
Essentially put it in LHCb namespace
Part of set of MRS LHCb!3785 (merged) Lbcom!628 (merged) !3123 (merged)
Edited by Sebastien Ponce
Essentially put it in LHCb namespace
Part of set of MRS LHCb!3785 (merged) Lbcom!628 (merged) !3123 (merged)