HPCC-9339 - Ecl packagemap validate results need to be clearer

Signed-off-by: Stuart Ort <stuart.ort@lexisnexis.com>
Merge pull request #4409 from stuartort/pkg_validateerrorreporting

HPCC-9339 - Ecl packagemap validate results need to be clearer

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>