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>.

Upgrade fluentd-elasticsearch addon to Elasticsearch/Kibana 5.6.2

Upgrade Elasticsearch and Kibana to version 5.6.2. I also upgrade some API versions of manifests to correspond to Kubernetes 1.8, I hope the latter is uncontroversial?

```release-notes
```