enable unit tests and server test cases on ubuntu
enable unit tests and server test cases on ubuntu

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