TEST: two more tests for depth first traversal
TEST: two more tests for depth first traversal

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