STATISTICS: added memory median and maximum in benchmarks
STATISTICS: added memory median and maximum in benchmarks

alhowaidi/cvmfsNDN,DrDaveD/cvmfs,trshaffer/cvmfs,alhowaidi/cvmfsNDN,Moliholy/cvmfs,Moliholy/cvmfs,cvmfs/cvmfs,reneme/cvmfs,djw8605/cvmfs,cvmfs/cvmfs,alhowaidi/cvmfsNDN,DrDaveD/cvmfs,DrDaveD/cvmfs,trshaffer/cvmfs,alhowaidi/cvmfsNDN,DrDaveD/cvmfs,Moliholy/cvmfs,djw8605/cvmfs,Moliholy/cvmfs,Gangbiao/cvmfs,cvmfs/cvmfs,djw8605/cvmfs,cvmfs/cvmfs,trshaffer/cvmfs,reneme/cvmfs,Gangbiao/cvmfs,DrDaveD/cvmfs,DrDaveD/cvmfs,reneme/cvmfs,cvmfs/cvmfs,Moliholy/cvmfs,trshaffer/cvmfs,reneme/cvmfs,djw8605/cvmfs,cvmfs/cvmfs,Gangbiao/cvmfs,trshaffer/cvmfs,alhowaidi/cvmfsNDN,Gangbiao/cvmfs,DrDaveD/cvmfs,reneme/cvmfs,djw8605/cvmfs,cvmfs/cvmfs,Gangbiao/cvmfs