[LLDP]: Port description (TLV 4) now contains '<neighbor_host_name>:<port_name>' (#772)

Author: jleveque

dockers/docker-lldp-sv2/lldpd.conf.j2

@@ -1,3 +1,3 @@
 {% for member in minigraph_ports.keys() %}
-configure ports {{member}} lldp portidsubtype local {{minigraph_ports[member]['alias']}}
+configure ports {{ member }} lldp portidsubtype local {{ minigraph_ports[member]['alias'] }} description {{ minigraph_neighbors[member]['name'] }}:{{ minigraph_neighbors[member]['port'] }}
 {% endfor %}