If orderDecimalQuantity set to N then system should return error if user add partial quantity in order

If productStore.orderDecimalQuantity and product.orderDecimalQuantity is set to N, then system should return error if we try to add to partial quantity then system should return error instead of rounding it to 0,

Actual Behavior: If partial quantity not allowed in in order process, and user enter 1.5 quantity then it rounded it and add 2 quantity.

Expected Behavior: if partial quantity not allowed then system should return error instead of doing rounding if partial quantity passed during add/update item.