Automatic merge from submit-queue

Implementing a proper master/worker split in the juju cluster code.

```
release-note-none
```

General updates to the cluster/juju Kubernetes provider, to bring it up to date.

Updating the skydns templates to version 11
Updating the etcd container definition to include arch.
Updating the master template to include arch and version for hyperkube container.
Adding dns_domain configuration options.
Adding storage layer options.

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