add ability to originate default on OSPF

vyos.conf.j2

@@ -121,6 +121,17 @@ protocols {
             abr-type {{ salt['pillar.get']('protocols:ospf:parameters:abr-type','cisco') }}
         }
 
+        {% if 'default-information' in salt['pillar.get']('protocols:ospf') %}
+        default-information {
+            {% if 'originate' in salt['pillar.get']('protocols:ospf:default-information') %}
+            originate {
+                {% if salt['pillar.get']('protocols:ospf:default-information:originate:metric',None) %}metric {{ salt['pillar.get']('protocols:ospf:default-information:originate:metric') }}{% endif %}
+                {% if salt['pillar.get']('protocols:ospf:default-information:originate:metric-type',None) %}metric-type {{ salt['pillar.get']('protocols:ospf:default-information:originate:metric-type') }}{% endif %}
+            }
+            {% endif %}
+        }
+        {% endif %}
+
         {% for iface_name, iface_data in pillar['netbox']['interfaces'].items() %}{% if salt['pillar.get']('interfaces:'+iface_name+':ip:ospf:passive') %}
         passive-interface {{ iface_name }}
         {% endif %}{% endfor %}