Change postion of the AIM "order" element in the request.

The "order" element must come before the "customer" element.
Authorize.Net is very fussy about the order in which the XML elements
are put together.

Author: judgej

src/Message/AIMAbstractRequest.php

@@ -150,6 +150,16 @@ public function getCardReference($serialize = true)
         return $value;
     }
 
+    public function getInvoiceNumber()
+    {
+        return $this->getParameter('invoiceNumber');
+    }
+
+    public function setInvoiceNumber($value)
+    {
+        return $this->setParameter('invoiceNumber', $value);
+    }
+
     public function sendData($data)
     {
         $headers = array('Content-Type' => 'text/xml; charset=utf-8');
@@ -213,13 +223,17 @@ protected function addBillingData(\SimpleXMLElement $data)
         /** @var mixed $req */
         $req = $data->transactionRequest;
 
+        // The order must come before the customer ID.
+        $req->order->invoiceNumber = $this->getInvoiceNumber();
+        $req->order->description = $this->getDescription();
+
         // Merchant assigned customer ID
         $customer = $this->getCustomerId();
         if (!empty($customer)) {
             $req->customer->id = $customer;
         }
 
-        $req->order->description = $this->getDescription();
+        //$req->order->description = $this->getDescription();
 
         /** @var CreditCard $card */
         if ($card = $this->getCard()) {