Merge pull request #4 from EasyOC/log_graphqlError

Log graphql error

src/OrchardCore.Modules/OrchardCore.Apis.GraphQL/GraphQLMiddleware.cs

@@ -122,7 +122,7 @@ private async Task ExecuteAsync(HttpContext context)
             catch (Exception e)
             {
                 await _serializer.WriteErrorAsync(context, "An error occurred while processing the GraphQL query", e);
-                return;
+                throw;
             }
 
             var queryToExecute = request.Query;