Reduced MockNameServer class to the single method addTapeFile()

catalogue/SqliteCatalogue.cpp

common/CMakeLists.txt

common/archiveNS/ArchiveDirEntry.cpp

common/archiveNS/ArchiveDirEntry.hpp

common/archiveNS/ArchiveDirIterator.cpp

common/archiveNS/ArchiveDirIterator.hpp

cta.spec.in

nameserver/CMakeLists.txt

nameserver/NameServer.hpp

nameserver/NameServerFactory.cpp

nameserver/NameServerFactory.hpp

nameserver/mockNS/MockNameServer.cpp

nameserver/mockNS/MockNameServer.hpp

nameserver/mockNS/MockNameServerFactory.cpp

nameserver/mockNS/MockNameServerFactory.hpp

nameserver/mockNS/MockNameServerTest.cpp

nameserver/mockNS/SmartFdTest.cpp

tapeserver/castor/tape/tapeserver/daemon/ProcessForker.cpp

tests/CMakeLists.txt

xroot_plugins/XrdCtaFilesystem.cpp