Distributor iterates through filter indices always in the same order,
accidentally favouring certain ports. This is particularly noticeable
for 3 outputs configured with the same item - lowest numbered port
is receiving double quantity (TA2 distributor moves items in pack of 4).
Fix provided in this patch adds an extra mapping for filter indexing,
permutating randomly outputs with identical items so no ports are
preferred anymore.
Signed-off-by: Michal Cieslakiewicz <michal.cieslakiewicz@wp.pl>