iptrunk - updated port-threshold Nokia side

Fixed var used in calculation of port-threshold in `iptrunk` role.

geant/gap_ansible/roles/iptrunk/templates/nokia/trunk_interface.j2

@@ -72,9 +72,9 @@
               <port-id>{{ member.interface_name }}</port-id>
           </port>
 {% endfor %}
-          {% if (common.minimum_links | int) > 1 %}
+          {% if (wfo_trunk.iptrunk.iptrunk_minimum_links | int) > 1 %}
           <port-threshold>
-            <value>{{ (common.minimum_links | int) - 1 }}</value>
+            <value>{{ (wfo_trunk.iptrunk.iptrunk_minimum_links | int) - 1 }}</value>
             <action>down</action>
           </port-threshold>
           {% endif %}