Added license comment to eaxh middletier source file

middletier/cta/AdminHost.cpp

middletier/cta/AdminHost.hpp

middletier/cta/AdminUser.cpp

middletier/cta/AdminUser.hpp

middletier/cta/ArchivalFileTransfer.cpp

middletier/cta/ArchivalFileTransfer.hpp

middletier/cta/ArchivalJob.cpp

middletier/cta/ArchivalJob.hpp

middletier/cta/ArchivalJobQueues.cpp

middletier/cta/ArchivalJobQueues.hpp

middletier/cta/ArchivalJobState.cpp

middletier/cta/ArchivalJobState.hpp

middletier/cta/ArchivalMount.cpp

middletier/cta/ArchivalMount.hpp

middletier/cta/ArchivalRequest.cpp

middletier/cta/ArchivalRequest.hpp

middletier/cta/ArchivalRequestHandler.hpp

middletier/cta/ArchivalRoute.cpp

middletier/cta/ArchivalRoute.hpp

middletier/cta/ArchivalRouteId.cpp