insert default GC timestamp threshold
insert default GC timestamp threshold

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