Renamed castor::exception::Errnum to

tapeserver/castor/exception/Errnum.cpp

tapeserver/castor/exception/Errnum.hpp

tapeserver/castor/exception/ExceptionTest.cpp

tapeserver/castor/io/IoTest.cpp

tapeserver/castor/messages/Mutex.cpp

tapeserver/castor/messages/MutexLockerTest.cpp

tapeserver/castor/messages/MutexTest.cpp

tapeserver/castor/server/ChildProcess.hpp

tapeserver/castor/server/Daemon.cpp

tapeserver/castor/server/Mutex.cpp

tapeserver/castor/server/Semaphores.cpp

tapeserver/castor/server/Threading.cpp

tapeserver/castor/server/Threading.hpp

tapeserver/castor/server/ThreadingTests.cpp

tapeserver/castor/tape/tapeserver/SCSI/Device.cpp

tapeserver/castor/tape/tapeserver/SCSI/DeviceTest.cpp

tapeserver/castor/tape/tapeserver/daemon/TapeDaemon.cpp

...r/castor/tape/tapeserver/daemon/TapeWriteSingleThread.cpp

tapeserver/castor/tape/tapeserver/daemon/TapeWriteTask.cpp

tapeserver/castor/tape/tapeserver/drive/DriveGeneric.cpp