First Data E4: Add TransArmor store/tokenization support

TransArmor is an API extension for implementing card number tokenization.

It requires v11 of the API, instead of the unspecified latest version (v12) previously used. The two API versions are nearly identical, and the unit tests have been updated with the v11 response.

TransArmor documentation is available at:

- https://firstdata.zendesk.com/entries/21303361-transarmor-tokenization
- https://firstdata.zendesk.com/entries/407571-first-data-global-gateway-e4sm-web-service-api-reference-guide#3.4