Changes to List Commission Rules

the items/fixed_amount/anyOf[subschema #1] response's property pattern ^(?!^[-+.]*$)[+-]?0*\d*\.?\d*$ was added for the status 200

the items/rate/anyOf[subschema #1] response's property pattern ^(?!^[-+.]*$)[+-]?0*\d*\.?\d*$ was added for the status 200