HPCC-12474 Report exceptions thrown by eclccserver

Signed-off-by: Gavin Halliday <gavin.halliday@lexisnexis.com>
Merge pull request #6582 from ghalliday/issue12474

HPCC-12474 Report exceptions thrown by eclccserver

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>