HPCC-12053 Make relative filename handling consistent.

Fixes regression introduced by HPCC-12037

Uncovered some inconsistencies in how names in meta info were
published when dealing with relative logical names.
One interestnig difference, exposed that UPDATE on relative
logical names wasn't working, causing in effect the UPDATE to be
ignore.

Signed-off-by: Jake Smith <jake.smith@lexisnexis.com>
Merge pull request #6323 from jakesmith/hpcc-12053

HPCC-12053 Make relative filename handling consistent.

Reviewed-by: Gavin Halliday <ghalliday@hpccsystems.com>