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

backport https://github.com/kubernetes/cloud-provider-openstack/pull/43

Backporting https://github.com/kubernetes/cloud-provider-openstack/pull/43

@dims @FengyunPan2 

```release-note
NONE
```