cta/CTA#135 cta <subcommand> ls output order

All CTA catalogue configuration entities (archive route, tape,
tape pool, etc.) except for archive file and tape file are now
ordered alphabetically.

Archive files and tape files are ordered by archive ID and copy
number.  This ordering is required so that we can implement our
own application level cursor over potentionally all archived
files.  This could be well over 4 billion files.  We do not
rely on database cursors as they would most fail before we have
had enough time to list all archived files.

If in the future we require a file listing command that orders
achive files alphabeltically, then I would suggest the
cta::Catalogue class implements two separate methods.  The
first implementation would list all files in archive ID order
and would not rely on the underlying database to implement the
cursor.  iBasically whta we have today.  The second
implementation would list all files in alphabetcial order and
would rely on the underlying database to achieve this.