fix unpin listener for exclusive cache
fix unpin listener for exclusive cache

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