Log trace message when handling exceptions in the API

src/NzbDrone.Api/ErrorManagement/NzbDroneErrorPipeline.cs

@@ -20,6 +20,7 @@ public NzbDroneErrorPipeline(Logger logger)
 
         public Response HandleException(NancyContext context, Exception exception)
         {
+            _logger.Trace("Handling Exception");
 
             var apiException = exception as ApiException;
 
@@ -49,7 +50,6 @@ public Response HandleException(NancyContext context, Exception exception)
                 }.AsResponse((HttpStatusCode)clientException.StatusCode);
             }
 
-
             if (context.Request.Method == "PUT" || context.Request.Method == "POST")
             {
                 var sqLiteException = exception as SQLiteException;