Create all chains before any rules

If some rules references other chains that are not yet present
state fails. Make sure all chains are created before any rules by
configuring requirement constraint.

Change-Id: Iaf506919f330ff962891baab8132c3b46c49a47c
Closes-Bug: PROD-18821

iptables/_rule.sls

   - position: {{ rule.position }}
   {%- else %}
   iptables.append:
-  {%- if loop.index != 1 %}
   - require:
+  {%- if loop.index != 1 %}
     - iptables: iptables_{{ chain_name }}_{% if service_name is defined %}{{ service_name }}_{% endif %}{{ loop.index - 1 }}
+  {%- else %}
+  {%- for chain in chains %}
+    - iptables: iptables_{{ chain }}
+  {%- endfor %}
   {%- endif %}
   {%- endif %}
   - table: {{ rule.get('table', 'filter') }}

iptables/rules.sls

 {% from "iptables/map.jinja" import service with context %}
 {%- if grains.get('virtual_subtype', None) not in ['Docker', 'LXC'] %}
 
+{%- set chains = service.get('chain', {}).keys() %}
 {%- for chain_name, chain in service.get('chain', {}).iteritems() %}
 
 iptables_{{ chain_name }}: