Fix: Changed Statuscode on invalid authorization

src/ApiCommons/Middleware/LoggingMiddleware.cs

-using Coscine.Configuration;
+using Coscine.Configuration;
 using Coscine.JwtHandler;
 using Coscine.Logging;
 using Microsoft.AspNetCore.Http;
@@ -63,7 +63,7 @@ namespace Coscine.ApiCommons.Middleware
                             // Get the User Id
                             var authorization = context.Request.Headers["Authorization"].ToArray();
                             string bearer = null;
-                            foreach (var line in authorization)
+                            foreach (var line in authorization) 
                             {
                                 if (line.Contains("Bearer"))
                                 {
@@ -180,8 +180,8 @@ namespace Coscine.ApiCommons.Middleware
 
                             if (!context.Response.HasStarted)
                             {
-                                context.Response.StatusCode = StatusCodes.Status500InternalServerError;
-                                byte[] data = System.Text.Encoding.UTF8.GetBytes("Unhandled Error occured. Please, try again in a while.");
+                                context.Response.StatusCode = StatusCodes.Status401Unauthorized;
+                                byte[] data = System.Text.Encoding.UTF8.GetBytes("Invalid authentication. Please try again.");
                                 context.Response.ContentLength = data.Length;
                                 originalResponseBody.Write(data, 0, data.Length);
                             }