Add request start without waiting for result

Hcs.Broker/Api/Request/NsiCommon/ExportNsiItemRequest.cs

@@ -24,5 +24,23 @@ namespace Hcs.Broker.Api.Request.NsiCommon
 
             return result.Item as NsiItemType;
         }
+
+        internal async Task<string> SendAsync(int registryNumber, ListGroup listGroup, CancellationToken token)
+        {
+            // http://open-gkh.ru/NsiCommon/exportNsiItemRequest.html
+            var request = new exportNsiItemRequest
+            {
+                Id = Constants.SIGNED_XML_ELEMENT_ID,
+                version = "10.0.1.2",
+                RegistryNumber = registryNumber.ToString(),
+                ListGroup = listGroup
+            };
+
+            return await StartSendAsync(request, async asyncClient =>
+            {
+                var response = await asyncClient.exportNsiItemAsync(CreateRequestHeader(), request);
+                return response.AckRequest.Ack;
+            }, token);
+        }
     }
 }