HPCC-11810 Landing Zone "add file" fails.

Fixes HPCC-11810

Signed-off-by: Gordon Smith <gordon.smith@lexisnexis.com>
Merge pull request #6153 from GordonSmith/HPCC-11810

HPCC-11810 Landing Zone "add file" fails.

Reviewed-By: Miguel Vazquez <miguel.vazquez@lexisnexis.com>
Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>