MAGETWO-70039: Fix mini-cart not emptied for logged out users checking out with PayPal Express #9994

Author: Oleksii Korshenko

app/code/Magento/Paypal/view/frontend/web/js/action/set-payment-method.js

@@ -17,7 +17,6 @@ define([
     return function (messageContainer) {
         var serviceUrl,
             payload,
-            method = 'put',
             paymentData = quote.paymentMethod();
 
         /**
@@ -32,17 +31,16 @@ define([
                 email: quote.guestEmail,
                 paymentMethod: paymentData
             };
-            method = 'post';
         } else {
-            serviceUrl = urlBuilder.createUrl('/carts/mine/selected-payment-method', {});
+            serviceUrl = urlBuilder.createUrl('/carts/mine/set-payment-information', {});
             payload = {
                 cartId: quote.getQuoteId(),
-                method: paymentData
+                paymentMethod: paymentData
             };
         }
         fullScreenLoader.startLoader();
 
-        return storage[method](
+        return storage.post(
             serviceUrl, JSON.stringify(payload)
         ).fail(function (response) {
             errorProcessor.process(response, messageContainer);