#533: Added support for disk system in queues and object store.

objectstore/AlgorithmsTest.cpp

objectstore/CMakeLists.txt

objectstore/GarbageCollector.cpp

objectstore/GarbageCollectorTest.cpp

objectstore/RetrieveQueue.cpp

objectstore/RetrieveQueue.hpp

objectstore/RetrieveQueueAlgorithms.hpp

objectstore/RetrieveQueueShard.cpp

objectstore/RetrieveQueueShard.hpp

objectstore/RetrieveQueueToTransferForUserAlgorithms.cpp

objectstore/RetrieveRequest.cpp

objectstore/RetrieveRequest.hpp

objectstore/Sorter.cpp

objectstore/Sorter.hpp

objectstore/cta.proto

scheduler/OStoreDB/MemQueues.cpp

scheduler/OStoreDB/OStoreDB.cpp

scheduler/OStoreDB/OStoreDB.hpp

scheduler/OStoreDB/OStoreDBFactory.hpp

scheduler/RetrieveMount.cpp