ProcessLocationHeader parameters not always respected

[pierre]

For APIs returning both 201 and 204 (e.g. createInstantPayment), isCreateRequest is false here and the code to respect the ProcessLocationHeader parameter isn't generated.

Compare CreateTaxItems with CreateInstantPayment.

[hibrid]

@pierre please see killbill/go-swagger#4

I believe that solves this issue once you generate the new binary and use it to regenerate the code.

Please let me know if I can help clarify anything.