Further moved common classes into respective namespaces.

common/CMakeLists.txt

common/archiveNS/ArchiveFile.cpp

common/archiveNS/ArchiveFile.hpp

common/archiveRoutes/ArchiveRoute.cpp

common/archiveRoutes/ArchiveRoute.hpp

common/archiveRoutes/ArchiveRouteId.cpp

common/archiveRoutes/ArchiveRouteId.hpp

objectstore/ArchiveToFileRequest.cpp

objectstore/ArchiveToFileRequest.hpp

objectstore/ArchiveToFileRequestTest.cpp

objectstore/GarbageCollectorTest.cpp

objectstore/RetrieveToFileRequest.cpp

objectstore/RetrieveToFileRequest.hpp

scheduler/ArchiveJob.cpp

scheduler/ArchiveJob.hpp

scheduler/ArchiveToFileRequest.cpp

scheduler/ArchiveToFileRequest.hpp

scheduler/DummyScheduler.cpp

scheduler/DummyScheduler.hpp

scheduler/OStoreDB/OStoreDB.cpp