use new lock for transaction handling
use new lock for transaction handling

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