Start iptables on each master in serial

Fix task hanging when running from a master

roles/os_firewall/tasks/firewall/iptables.yml

@@ -29,6 +29,9 @@
     masked: no
     daemon_reload: yes
   register: result
+  delegate_to: "{{item}}"
+  run_once: true
+  with_items: "{{ ansible_play_hosts }}"
 
 - name: need to pause here, otherwise the iptables service starting can sometimes cause ssh to fail
   pause: seconds=10