Renamed DirIterator to ArchiveDirIterator

common/ArchiveDirIterator.cpp

common/ArchiveDirIterator.hpp

common/CMakeLists.txt

nameserver/MockNameServer.cpp

nameserver/MockNameServer.hpp

nameserver/MockNameServerTest.cpp

nameserver/NameServer.hpp

scheduler/MockSchedulerDatabase.cpp

scheduler/Scheduler.cpp

scheduler/Scheduler.hpp

scheduler/SchedulerTest.cpp

xroot_plugins/XrdProFile.cpp