HPCC-8813 The test aggsqx3.ecl key is out of date

The test aggsqx3.ecl key is out of date. The ecl was updated because was using
an obsolete ECL feature, but the key was not changed at the same time.

Signed-off-by: Richard Chapman <rchapman@hpccsystems.com>
Merge pull request #3975 from richardkchapman/aggsqx3

HPCC-8813 The test aggsqx3.ecl key is out of date

Reviewed-by: Gavin Halliday <ghalliday@hpccsystems.com>