HPCC-11610 Control:reload may leave state hash incorrect

Signed-off-by: Richard Chapman <rchapman@hpccsystems.com>
Merge pull request #6008 from richardkchapman/roxie-reload-hash-zero

HPCC-11610 Control:reload may leave state hash incorrect

Reviewed-by: Gavin Halliday <ghalliday@hpccsystems.com>