Update an existing cart with the modified order data
Like SoftLayer_Billing_Order_Cart::createCart, the order data will be sent through SoftLayer_Product_Order::verifyOrder to make sure that the updated cart information is valid. Once it has been verified, the new order data will be saved.
This will return the cart id.
|orderData||SoftLayer_Container_Product_Order||The order data to save as a cart|