Merge pull request #42694 from dchen1107/master

Automatic merge from submit-queue (batch tested with PRs 42734, 42745, 42758, 42814, 42694)

Dropped docker 1.9.x support. Changed the minimumDockerAPIVersion to

1.22

cc/ @Random-Liu @yujuhong 

We talked about dropping docker 1.9.x support for a while. I just realized that we haven't really done it yet. 

```release-note
Dropped the support for docker 1.9.x and the belows. 
```
This commit is contained in:
Kubernetes Submit Queue 2017-03-09 15:07:00 -08:00 committed by GitHub
commit d790851c8f

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@ -82,8 +82,8 @@ const (
dockerDefaultLoggingDriver = "json-file"
// https://docs.docker.com/engine/reference/api/docker_remote_api/
// docker version should be at least 1.9.x
minimumDockerAPIVersion = "1.21"
// docker version should be at least 1.10.x
minimumDockerAPIVersion = "1.22"
// Remote API version for docker daemon versions
// https://docs.docker.com/engine/reference/api/docker_remote_api/