Braintree: Add unit test for PaymentAdditionalInformationProvider#17456

dmytro-ch wants to merge 2 commits intomagento:2.2-developmagento/magento2:2.2-developfrom

dmytro-ch:2.2-unit-test-braintree-additional-information-providerdmytro-ch/magento2:2.2-unit-test-braintree-additional-information-providerCopy head branch name to clipboard