Fix use_production_url -> use_production_account

This was wrong in the Avalara sample code I copied it from: https://github.com/avadev/AvaTax-Calc-SOAP-Ruby/blob/81eb53b/PostTaxTest.rb#L12
Merge branch '2-2-stable' into 2-2-dev

And update associated ReturnInvoice configs specific to this branch