Fix vault file owner issues and k8s apiserver cert creation (#2985)

apiserver cert should be created only once

roles/etcd/tasks/sync_etcd_master_certs.yml

@@ -13,6 +13,8 @@
     sync_file: "{{ item }}"
     sync_file_dir: "{{ etcd_cert_dir }}"
     sync_file_hosts: [ "{{ inventory_hostname }}" ]
+    sync_file_owner: kube
+    sync_file_group: root
     sync_file_is_cert: true
   with_items: "{{ etcd_master_cert_list|d([]) }}"