For all `Product` models inside of the REST responses for purchased plans, the details of those products should be sourced from IRO and mapped to fields in our response.
IRO relies on Walmart's SOA registry and requires consumer keys in specially formed headers:
Rollup API documented here:
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Headers format documented here:
https://confluence.walmart.com/display/PGSIRO/Request+Headers
Done When:
* WPP services have integrated with IRO to populate product details in the purchased plan model
POST item-read-service/productOffers/productRollups
Retrieves Product rollup information for the given Product Ids.