Changed authorization header key to be the standard 'Authorization', …

…otherwise, it does not work (#114)

Signed-off-by: Andres Mendoza <[email protected]>

src/Jaeger/Senders/HttpSender.cs

@@ -42,7 +42,7 @@ private HttpSender(Builder builder)
             var customHeaders = new Dictionary<string, string>();
             if (builder.AuthenticationHeaderValue != null)
             {
-                customHeaders.Add("Authorize", builder.AuthenticationHeaderValue.ToString());
+                customHeaders.Add("Authorization", builder.AuthenticationHeaderValue.ToString());
             }
 
             _transport = new THttpClientTransport(collectorUri, customHeaders);