Changed volume mode into mount type, filling in volInfo with the tape mount object

scheduler/ArchiveMount.cpp

scheduler/ArchiveMount.hpp

scheduler/RetrieveMount.cpp

scheduler/RetrieveMount.hpp

scheduler/TapeMount.hpp

tapeserver/castor/tape/tapegateway/ClientType.hpp

tapeserver/castor/tape/tapeserver/client/ClientInterface.hpp

...ver/castor/tape/tapeserver/daemon/DataTransferSession.cpp

...ver/castor/tape/tapeserver/daemon/DataTransferSession.hpp

.../castor/tape/tapeserver/daemon/RecallTaskInjectorTest.cpp

...er/castor/tape/tapeserver/daemon/TapeReadSingleThread.cpp

...er/castor/tape/tapeserver/daemon/TapeReadSingleThread.hpp

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

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