MAGETWO-32931: Accepting and Rejecting Transactions Marked as "Held for Review" by Gateway

- Add soap authorize, sale, subscription, accept commands

Author: Viktor Tymchynskyi

app/code/Magento/Payment/Model/Method/Adapter.php

@@ -454,7 +454,7 @@ public function denyPayment(InfoInterface $payment)
             'deny_payment',
             $payment
         );
-        return false;
+        return $this;
     }
 
     /**

app/code/Magento/Sales/Model/Order/Payment.php

@@ -1014,9 +1014,14 @@ public function deny($isOnline = true)
     {
         $transactionId = $isOnline ? $this->getLastTransId() : $this->getTransactionId();
 
-        $result = $isOnline ?
-            $this->getMethodInstance()->setStore($this->getOrder()->getStoreId())->denyPayment($this) :
-            (bool)$this->getNotificationResult();
+        if ($isOnline) {
+            /** @var \Magento\Payment\Model\Method\AbstractMethod $method */
+            $method = $this->getMethodInstance();
+            $method->setStore($this->getOrder()->getStoreId());
+            $result = $method->denyPayment($this);
+        } else {
+            $result = (bool)$this->getNotificationResult();
+        }
 
         if ($result) {
             $invoice = $this->_getInvoiceForTransactionId($transactionId);