Fixed VeloTrackMonitor to work with online tracks and moderinzed VeloTrackMonitor

Fixed VeloTrackMonitor so that the 2nd metal layer effects monitoring histograms are produced in the BrunelOnline environment (uses lite not full clusters in fits)

Also modernized VeloTrackMontior Removed empty destructor, simplified constructors, used auto, removed unused variables, better array initialisation and used C++11 lambdas rather than boost lambda and bind.