Sync fedora-cloud modules with Container Linux

* Update manifests for Kubernetes v1.10.0
* Update etcd from v3.3.2 to v3.3.3
* Add disk_type optional variable on AWS
* Remove redundant kubeconfig copy on AWS
* Distribute etcd secres only to controllers
* Organize module variables and ssh steps

aws/fedora-cloud/kubernetes/workers/cloudinit/worker.yaml.tmpl

@@ -7,9 +7,8 @@ yum_repos:
     gpgcheck: true
     gpgkey: https://packages.cloud.google.com/yum/doc/yum-key.gpg https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
 packages:
-  - vim
-  - docker
-  - kubelet
+  - [docker, 1.13.1]
+  - [kubelet, 1.10.0]
   - nfs-utils
 write_files:
   - path: /etc/systemd/system/kubelet.service.d/10-typhoon.conf