#471 added unit test.

catalogue/DropSchemaCmd.cpp

catalogue/RdbmsCatalogue.cpp

common/dataStructures/DesiredDriveState.hpp

common/dataStructures/DriveState.cpp

common/dataStructures/DriveState.hpp

common/dataStructures/RetrieveFileQueueCriteria.cpp

objectstore/DriveState.cpp

scheduler/ArchiveMount.hpp

scheduler/LabelMount.hpp

scheduler/OStoreDB/OStoreDB.cpp

scheduler/OStoreDB/OStoreDB.hpp

scheduler/RetrieveMount.cpp

scheduler/RetrieveMount.hpp

scheduler/Scheduler.cpp

scheduler/Scheduler.hpp

scheduler/SchedulerDatabase.hpp

scheduler/SchedulerTest.cpp

scheduler/TapeMount.hpp

scheduler/TapeMountDummy.hpp