Address PR comments

Author: lilic

Diff for: pkg/manifests/config.go

@@ -1,4 +1,4 @@
-/// Copyright 2018 The Cluster Monitoring Operator Authors
+// Copyright 2018 The Cluster Monitoring Operator Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

Diff for: pkg/operator/operator.go

@@ -426,7 +426,7 @@ func (o *Operator) Config(key string) (*manifests.Config, error) {
 	if *c.ClusterMonitoringConfiguration.UserWorkloadEnabled {
 		c.UserWorkloadConfiguration, err = o.loadUserWorkloadConfig()
 		if err != nil {
-
+			return nil, err
 		}
 	}