Merge pull request #985 from rutsky/check-mode-for-shell-commands

roles/bootstrap-os/tasks/bootstrap-coreos.yml

roles/docker/tasks/set_facts_dns.yml

roles/download/tasks/set_docker_image_facts.yml

roles/etcd/tasks/configure.yml

roles/etcd/tasks/gen_certs_script.yml

roles/etcd/tasks/set_cluster_health.yml

roles/kubernetes/preinstall/tasks/main.yml

roles/kubernetes/preinstall/tasks/set_resolv_facts.yml

roles/kubernetes/secrets/tasks/gen_certs_script.yml

roles/kubernetes/secrets/tasks/gen_tokens.yml

roles/network_plugin/flannel/tasks/main.yml

roles/reset/tasks/main.yml