added a Lockable template to make arbitrary classes to monitors
added a Lockable template to make arbitrary classes to monitors

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