HPCC-9641 Use DEFAULT() attributes for omitted values in inline tables.

Signed-off-by: Gavin Halliday <gavin.halliday@lexisnexis.com>
Merge pull request #4623 from ghalliday/issue9641

HPCC-9641 Use DEFAULT() attributes for omitted values in inline tables.

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>