SessionContext - only drop lease after all upload jobs are finished
SessionContext - only drop lease after all upload jobs are finished

DrDaveD/cvmfs,cvmfs/cvmfs,cvmfs/cvmfs,DrDaveD/cvmfs,DrDaveD/cvmfs,djw8605/cvmfs,Gangbiao/cvmfs,DrDaveD/cvmfs,DrDaveD/cvmfs,Gangbiao/cvmfs,Gangbiao/cvmfs,cvmfs/cvmfs,DrDaveD/cvmfs,djw8605/cvmfs,DrDaveD/cvmfs,djw8605/cvmfs,cvmfs/cvmfs,djw8605/cvmfs,cvmfs/cvmfs,djw8605/cvmfs,Gangbiao/cvmfs,Gangbiao/cvmfs,cvmfs/cvmfs,cvmfs/cvmfs