HPCC-12030 Add some local smart join tests

Signed-off-by: Gavin Halliday <gavin.halliday@lexisnexis.com>
Merge pull request #26 from ghalliday/issue12030

HPCC-12030 Add some local smart join tests

Reviewed-By: Jake Smith <jake.smith@lexisnexis.com>
Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>