add test for I/O of a wrapper of points (Track), a wrapper of std::vector of points (Cluster) and a vector of wrappers of points (VecTrack) to try to reproduce problem reportyed by CMS


git-svn-id: http://root.cern.ch/svn/root/trunk@17024 27541ba8-7e3a-0410-8455-c3a389f83636