Change comments about #ifdef COOL400 (CORALCOOL-2943)

src/CoolKernel/CoolKernel/ChannelSelection.h

src/CoolKernel/CoolKernel/CompositeSelection.h

src/CoolKernel/CoolKernel/FieldSelection.h

src/CoolKernel/CoolKernel/FolderSpecification.h

src/CoolKernel/CoolKernel/FolderVersioning.h

src/CoolKernel/CoolKernel/HvsTagLock.h

src/CoolKernel/CoolKernel/IDatabase.h

src/CoolKernel/CoolKernel/IHvsNode.h

src/CoolKernel/CoolKernel/ITransaction.h

src/CoolKernel/CoolKernel/PayloadMode.h

src/CoolKernel/CoolKernel/RecordException.h

src/CoolKernel/CoolKernel/StorageType.h

src/CoolKernel/CoolKernel/pointers.h

src/PyCool/dict/PyCool_headers.h

src/RelationalCool/src/ManualTransaction.cpp

src/RelationalCool/src/ManualTransaction.h

src/RelationalCool/src/RalDatabase.cpp

src/RelationalCool/src/RalDatabase.h

src/RelationalCool/src/RelationalDatabase.h

src/RelationalCool/src/TransRalDatabase.h