Use K8s 1.14 and add kubeadm experimental control plane mode (#4514)

* Use K8s 1.14 and add kubeadm experimental control plane mode

This reverts commit d39c273d96.

* Cleanup kubeadm setup run on first master

* pin kubeadm_certificate_key in test

* Remove kubelet autolabel of kube-node, add symlink for pki dir

Change-Id: Id5e74dd667c60675dbfe4193b0bc9fb44380e1ca

roles/kubernetes/master/tasks/kubeadm-upgrade.yml

@@ -17,6 +17,8 @@
   failed_when: kubeadm_upgrade.rc != 0 and "field is immutable" not in kubeadm_upgrade.stderr
   notify: Master | restart kubelet
 
+# FIXME: https://github.com/kubernetes/kubeadm/issues/1498 remove stdout_lines
+# check after issue is fixed
 - name: kubeadm | Upgrade other masters
   command: >-
     timeout -k 600s 600s
@@ -29,5 +31,8 @@
     --etcd-upgrade=false
   register: kubeadm_upgrade
   when: inventory_hostname != groups['kube-master']|first
-  failed_when: kubeadm_upgrade.rc != 0 and "field is immutable" not in kubeadm_upgrade.stderr
+  failed_when:
+    - kubeadm_upgrade.rc != 0
+    - '"field is immutable" not in kubeadm_upgrade.stderr'
+    - kubeadm_upgrade.stdout_lines | length > 1
   notify: Master | restart kubelet