Merge pull request kubernetes#1278 from bart0sh/PR0003-kubeadm-structured-output-state

kubeadm-machine-output: change status to 'implementable'

Author: k8s-ci-robot

keps/sig-cluster-lifecycle/kubeadm/20190506-kubeadm-machine-output.md

@@ -21,7 +21,7 @@ approvers:
 editor:
 creation-date: 2019-05-06
 last-updated: 2019-05-29
-status: provisional
+status: implementable
 ---
 
 # Kubeadm machine output