Update ISendAsync.cs (#662)

* Update ISendAsync.cs

pass only Authorization to next header for long running operations.

* Update ISendAsync.cs

* Update ISendAsync.cs

fix potential null reference

* Update ISendAsync.cs

* Update ISendAsync.cs

* Update ISendAsync.cs

Author: VeryEarly

powershell/resources/runtime/csharp/pipeline/ISendAsync.cs

@@ -252,12 +252,19 @@ internal static HttpRequestMessage Clone(this HttpRequestMessage original, Syste
             {
                 clone.Properties.Add(prop);
             }
-
+            
             foreach (KeyValuePair<string, IEnumerable<string>> header in original.Headers)
-            {
+            {   
+                /*
+                **temporarily skip cloning telemetry related headers**
                 clone.Headers.TryAddWithoutValidation(header.Key, header.Value);
+                */
+                if (!"x-ms-unique-id".Equals(header.Key) && !"x-ms-client-request-id".Equals(header.Key) && !"CommandName".Equals(header.Key) && !"FullCommandName".Equals(header.Key) && !"ParameterSetName".Equals(header.Key) && !"User-Agent".Equals(header.Key))
+                {
+                    clone.Headers.TryAddWithoutValidation(header.Key, header.Value);
+                }
             }
-
+            
             return clone;
         }
 
@@ -286,4 +293,4 @@ internal static async Task<HttpRequestMessage> CloneWithContent(this HttpRequest
             return clone;
         }
     }
-}
+}