FIX: Unneded (extra) cycles in some tasks (#1393)

roles/etcd/tasks/sync_etcd_master_certs.yml

@@ -8,6 +8,7 @@
         "member-" + item + ".pem"
         ] }}
   with_items: "{{ groups.etcd }}"
+  run_once: true
 
 - include: ../../vault/tasks/shared/sync_file.yml
   vars: 
@@ -16,6 +17,7 @@
     sync_file_hosts: "{{ groups.etcd }}"
     sync_file_is_cert: true
   with_items: "{{ etcd_master_cert_list|d([]) }}"
+  run_once: true
 
 - name: sync_etcd_certs | Set facts for etcd sync_file results
   set_fact:
@@ -32,6 +34,7 @@
     sync_file: ca.pem
     sync_file_dir: "{{ etcd_cert_dir }}"
     sync_file_hosts: "{{ groups.etcd }}"
+  run_once: true
 
 - name: sync_etcd_certs | Unset sync_file_results after ca.pem sync
   set_fact: