test: add paypro test to verify a real PaymentRequest.
test: add paypro test to verify a real PaymentRequest.

martindale/bitcore,martindale/bitcore,bitjson/bitcore,bitjson/bitcore,Bitcoinsulting/bitcore-payment-protocol,braydonf/bitcore-payment-protocol,bitpay/bitcore,bitpay/bitcore,Bitcoinsulting/bitcore-payment-protocol,MonetaryUnit/bitcore-payment-protocol,bitjson/bitcore,bitpay/bitcore-payment-protocol,bitpay/bitcore,bankonme/bitcore-payment-protocol,bitpay/bitcore,braydonf/bitcore-payment-protocol,bitpay/bitcore-payment-protocol,MonetaryUnit/bitcore-payment-protocol,martindale/bitcore,martindale/bitcore,bitjson/bitcore,bankonme/bitcore-payment-protocol