Moved cta::DriveState and cta::DrveStatus classes into cta::common.

common/DriveState.hpp

objectstore/DriveRegister.cpp

objectstore/DriveRegister.hpp

scheduler/ArchiveMount.cpp

scheduler/ArchiveMount.hpp

scheduler/OStoreDB/OStoreDB.cpp

scheduler/OStoreDB/OStoreDB.hpp

scheduler/OStoreDB/OStoreDBFactory.hpp

scheduler/RetrieveMount.cpp

scheduler/RetrieveMount.hpp

scheduler/Scheduler.cpp

scheduler/Scheduler.hpp

scheduler/SchedulerDatabase.hpp

...erver/castor/tape/tapeserver/daemon/DiskWriteTaskTest.cpp

...castor/tape/tapeserver/daemon/DiskWriteThreadPoolTest.cpp

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

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

...rver/castor/tape/tapeserver/daemon/RecallReportPacker.cpp

...rver/castor/tape/tapeserver/daemon/RecallReportPacker.hpp

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