Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

*-controller-manager: output flags in logical sections

![image](https://user-images.githubusercontent.com/30410021/44071436-8e619e72-9fbb-11e8-84c5-72c1ff9767b6.png)

```
Print *-controller-manager --help flag help in sections.
```