interface under isis - L2 only

level-capability = 2 is needed under interface as well to completely get rid of L1.

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

@@ -18,6 +18,7 @@
                         <interface-name>{{ interface_name | lower  }}.0</interface-name>
                         <admin-state>enable</admin-state>
                         <interface-type>point-to-point</interface-type>
+                        <level-capability>2</level-capability>
                         <level>
                             <level-number>2</level-number>
                             <metric>{{ isis_metric }}</metric>