MAGETWO-61561: Card is not saved after checkout with Braintree Credit Card using Vault

Author: viktym

app/code/Magento/Braintree/Model/PaymentMethod.php

@@ -269,6 +269,7 @@ public function assignData(\Magento\Framework\DataObject $data)
 
         $infoInstance->setAdditionalInformation('cc_last4', $additionalData->getData('cc_last4'));
         $infoInstance->setAdditionalInformation('cc_token', $additionalData->getData('cc_token'));
+        $infoInstance->setAdditionalInformation('store_in_vault', $additionalData->getData('store_in_vault'));
         $infoInstance->setAdditionalInformation(
             'payment_method_nonce',
             $additionalData->getData('payment_method_nonce')