Braintree

* Add `fraud_service_provider` field to `risk_data`
* Add `authorization_expires_at` to `Transaction`
* Remove invalid transaction tests
* Allow PayPal payment ID and payer ID to be passed during transaction create
* Add `travel_flight` support to industry-specific data
* Add `processor_response_type` to `Transaction`, `AuthorizationAdjustment`, and `CreditCardVerification`.

* Add new field `network_transaction_id` in transaction response.
* Add `external_vault` option to transaction sale.
* Add `LocalPaymentCompleted` webhook.
* Add `processor_response_type` to `Transaction`, `AuthorizationAdjustment`, and `CreditCardVerification`.

* Add ID to Transaction in SubscriptionChargedSuccessfully test webhook (99, thanks bjackson)
* Fix dispute results in transactions not showing the correct status sometimes
* Add Elo card type support

* Add processor respone code and processor response text to authorization adjustments subfield in transaction response.
* Add support for Samsung Pay

* Allow payee ID to be passed in options params for transaction create
* Add `merchant_id` alias to ConnectedMerchantStatusTransitioned and ConnectedMerchantPayPalStatusChanged Auth webhooks

* Add support for US Bank Account verifications API