quote result var in case of errors, and clean up replica repo on exit
quote result var in case of errors, and clean up replica repo on exit

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