Add new elements for pppoe

network/interfaces.sls

   {% if n.user is defined %}
     - user: {{ n.user }}
   {% endif %}
-  {% if n.pass is defined %}
-    - pass: {{ n.pass }}
+  {% if n.password is defined %}
+    - password: {{ n.password }}
+  {% endif %}
+  {% if n.pppoe_iface is defined %}
+    - pppoe_iface: {{ n.pppoe_iface }}
   {% endif %}
   {% if n.type|default(datamap.interfaces.default_values.type) == 'vlan' and datamap.interfaces.vlan_pkg|default('vlan') %}
     {% do pkgs.append(datamap.interfaces.vlan_pkg|default('vlan')) %}