HPCC-9535 Rationalize Roxie topology info

Cyclic redundancy was allocating channels incorrectly.

Signed-off-by: Richard Chapman <rchapman@hpccsystems.com>
Merge pull request #4564 from richardkchapman/roxie-cyclic

HPCC-9535 Rationalize Roxie topology info

Reviewed-by: Gavin Halliday <ghalliday@hpccsystems.com>