rewrite the statistics retrieval using the new statistics counters class
rewrite the statistics retrieval using the new statistics counters class

MicBrain/cvmfs,trshaffer/cvmfs,MicBrain/cvmfs,cvmfs/cvmfs,trshaffer/cvmfs,cvmfs/cvmfs,reneme/cvmfs,reneme/cvmfs,Moliholy/cvmfs,Gangbiao/cvmfs,Gangbiao/cvmfs,bbockelm/cvmfs,Moliholy/cvmfs,cvmfs-testing/cvmfs,Moliholy/cvmfs,reneme/cvmfs,Gangbiao/cvmfs,alhowaidi/cvmfsNDN,djw8605/cvmfs,alhowaidi/cvmfsNDN,cvmfs-testing/cvmfs,DrDaveD/cvmfs,DrDaveD/cvmfs,cvmfs/cvmfs,bbockelm/cvmfs,DrDaveD/cvmfs,Gangbiao/cvmfs,alhowaidi/cvmfsNDN,reneme/cvmfs,cvmfs/cvmfs,djw8605/cvmfs,reneme/cvmfs,DrDaveD/cvmfs,Moliholy/cvmfs,trshaffer/cvmfs,cvmfs/cvmfs,trshaffer/cvmfs,cvmfs-testing/cvmfs,MicBrain/cvmfs,cvmfs/cvmfs,DrDaveD/cvmfs,cvmfs/cvmfs,MicBrain/cvmfs,Gangbiao/cvmfs,cvmfs-testing/cvmfs,bbockelm/cvmfs,trshaffer/cvmfs,bbockelm/cvmfs,bbockelm/cvmfs,djw8605/cvmfs,djw8605/cvmfs,MicBrain/cvmfs,DrDaveD/cvmfs,DrDaveD/cvmfs,Moliholy/cvmfs,djw8605/cvmfs,cvmfs-testing/cvmfs,alhowaidi/cvmfsNDN,alhowaidi/cvmfsNDN