Allow altering the request data sent to Authorize.Net during payment transaction

Problem/Motivation

Currently there is no way to alter the request data before it is being sent to Authorize.Net for generating the token during payment.

Use case:
I am using this module. And the client want to make the sending of billing address as optional. It should be governed by a flag that is stored in $order.

Proposed resolution

Write a hook that will allow altering the request. The hook should be called just before the request is being sent to Authorize.Net.

Remaining tasks

N/A

User interface changes

N/A

API changes

A new hook will be available that will alter the request sent to Authorize.net.

Data model changes

N/A