FIX: harmonize CVMFS nightly version scheme
FIX: harmonize CVMFS nightly version scheme

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