CRM-6039 ContributionProcessor.php does not populate first_name and last_name for Google Checkout

ContributionProcessor.php leverages CRM/Contribute/BAO/Contribution/Utils.php::formatAPIParams() to map incoming fields to local CiviCRM fields. Currently the code does not populate the first_name and last_names fields, which is somewhat important. By default Google Checkout notifications don't include first and last name elements, but only a single concatenated name. However, it is possible to turn on a feature via the integration settings at Google Checkout that will cause Google to emit first and last name fields in the notifications. However, formatAPIParams() uses a section of the notifications ([risk-information-notification]) to obtain user data that will never contain the first and last name fields. The attached patches should fix this issue. They are for:

CRM/Contribute/BAO/Contribution/Utils.php
bin/ContributionProcessor.php

For reference see this forum thread:

http://forum.civicrm.org/index.php?topic=12987

Though I stumbled across this issue with contributions pulled in via ContributionProcessor.php, presumably this affects all Google Checkout contributions.

Nathan