HPCC-9248 Option to expand hash distribute and match existing distribution

Signed-off-by: Gavin Halliday <gavin.halliday@lexisnexis.com>
Merge pull request #4427 from ghalliday/issue9248

HPCC-9248 Option to expand hash distribute and match existing distribution

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>