fix return values in virtual catalog integration test
fix return values in virtual catalog integration test

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