Merge pull request #18 from ghalliday/issue10349

HPCC-10349 Initial version of the performance test suite
HPCC-10652 Summarise each test case and what it is intended to test

Signed-off-by: Gavin Halliday <gavin.halliday@lexisnexis.com>
Merge pull request #19 from ghalliday/issue10652

HPCC-10652 Summarise each test case and what it is intended to test

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>
HPCC-10349 Add join, dedup and distribute tests

Signed-off-by: Gavin Halliday <gavin.halliday@lexisnexis.com>