ACP2E-2969: REST API unable to make requests with slash (/) in SKU when using Oauth1

Author: aplapana

dev/tests/api-functional/framework/Magento/TestFramework/Authentication/Rest/OauthClient/Signature.php

@@ -42,12 +42,13 @@ function ($carry, $item) {
             []
         );
 
-        foreach ($params as $key => $value) {
-            $queryStringData[rawurlencode($key)] = rawurlencode($value);
+        $signatureData = [];
+        foreach (array_merge($queryStringData, $params) as $key => $value) {
+            $signatureData[rawurldecode($key)] = rawurlencode($value);
         }
 
         return $this->helper->sign(
-            $queryStringData,
+            $signatureData,
             'SHA256',
             $this->credentials->getConsumerSecret(),
             $this->tokenSecret,