MAGETWO-58162: PayPal Payflow Pro always using USD (even if this currency is absent on your store)

Author: rliukshyn

app/code/Magento/Paypal/Model/Payflow/Transparent.php

@@ -166,6 +166,7 @@ public function authorize(InfoInterface $payment, $amount)
         $request->setData('trxtype', self::TRXTYPE_AUTH_ONLY);
         $request->setData('origid', $token);
         $request->setData('amt', $this->formatPrice($amount));
+        $request->setData('currency', $order->getBaseCurrencyCode());
 
         $response = $this->postRequest($request, $this->getConfig());
         $this->processErrors($response);