Fix certificate-key param for kubeadm init (#4789)

* Fix certificate-key param for kubeadm init

* Fix yamllint error

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

@@ -106,13 +106,13 @@
     {{ bin_dir }}/kubeadm init
     --config={{ kube_config_dir }}/kubeadm-config.yaml
     --ignore-preflight-errors=all
+    --skip-phases=addon/coredns
     {% if kubeadm_version is version('v1.14.0', '>=') %}
     --experimental-upload-certs
-    {% endif %}
-    --skip-phases=addon/coredns
     {% if kubeadm_certificate_key is defined %}
     --certificate-key={{ kubeadm_certificate_key }}
     {% endif %}
+    {% endif %}
   register: kubeadm_init
   # Retry is because upload config sometimes fails
   retries: 3