fix ATLASRECTS-5098 irreproducibility issue, using vector of pair instead of...
partly fix ATLASRECTS-5098 irreproducibility issue, using vector of pair instead of multimap to keep track and its score.
ATLASRECTS-5098 reports irreproducibility issues on TrackCollection and PixelGangedClusterAmbiguities leaves in ESD root file.
This MR fix irreproducibility issue on TrackCollection.
PixelGangedClusterAmbiguities irreproducibility issue is still under investigating.