HPCC-8896 Dict_keyed test failing regression suite in translation mode

Faulty test.

Signed-off-by: Richard Chapman <rchapman@hpccsystems.com>
Merge pull request #4037 from richardkchapman/dict-keyedtest

HPCC-8896 Dict_keyed test failing regression suite in translation mode

Reviewed-by: Gavin Halliday <ghalliday@hpccsystems.com>