Storage class is now qualified by disk instance

catalogue/Catalogue.hpp

catalogue/CatalogueTest.cpp

catalogue/CatalogueTest.hpp

catalogue/OracleCatalogue.cpp

catalogue/RdbmsCatalogue.cpp

catalogue/RdbmsCatalogue.hpp

catalogue/SqliteCatalogue.cpp

catalogue/catalogue_common_schema.sql

common/dataStructures/ArchiveRoute.cpp

common/dataStructures/ArchiveRoute.hpp

common/dataStructures/RequesterGroupMountRule.cpp

common/dataStructures/RequesterGroupMountRule.hpp

common/dataStructures/RequesterMountRule.cpp

common/dataStructures/RequesterMountRule.hpp

common/dataStructures/StorageClass.cpp

common/dataStructures/StorageClass.hpp

common/exception/UserError.cpp

common/exception/UserError.hpp

scheduler/SchedulerTest.cpp

xroot_plugins/XrdCtaFile.cpp