Maintains the internal pd_product_reward_points lookup table (one row per customer
group plus a default multiplier at key 0) and, on demand, recalculates OpenCart
oc_product_reward rows and the aggregate points column on
oc_product from active product prices and group discounts.
Prerequisite
customers/dealerDiscounts.php) first. Click on “Update Prices” so
oc_product_discount reflects quantity-1 group prices before reward points are recalculated.