FIX: unit test for `Fetcher::Fetch()` API change
FIX: unit test for `Fetcher::Fetch()` API change

Gangbiao/cvmfs,Moliholy/cvmfs,DrDaveD/cvmfs,alhowaidi/cvmfsNDN,DrDaveD/cvmfs,Gangbiao/cvmfs,Moliholy/cvmfs,DrDaveD/cvmfs,Gangbiao/cvmfs,DrDaveD/cvmfs,cvmfs/cvmfs,alhowaidi/cvmfsNDN,trshaffer/cvmfs,reneme/cvmfs,djw8605/cvmfs,DrDaveD/cvmfs,Gangbiao/cvmfs,djw8605/cvmfs,djw8605/cvmfs,cvmfs/cvmfs,reneme/cvmfs,alhowaidi/cvmfsNDN,trshaffer/cvmfs,cvmfs/cvmfs,trshaffer/cvmfs,reneme/cvmfs,trshaffer/cvmfs,cvmfs/cvmfs,Moliholy/cvmfs,cvmfs/cvmfs,reneme/cvmfs,Moliholy/cvmfs,alhowaidi/cvmfsNDN,reneme/cvmfs,djw8605/cvmfs,cvmfs/cvmfs,cvmfs/cvmfs,DrDaveD/cvmfs,djw8605/cvmfs,alhowaidi/cvmfsNDN,Gangbiao/cvmfs,trshaffer/cvmfs,DrDaveD/cvmfs,Moliholy/cvmfs