Explicitly configure STUN/TURN service discovery

It didn't return any services without the explicit config.

site-cookbooks/kosmos-ejabberd/templates/ejabberd.yml.erb

@@ -80,7 +80,7 @@ listen:
     module: ejabberd_stun
     auth_realm: <%= @stun_auth_realm %>
     use_turn: true
-    turn_ip: <%= @turn_ip_address %>
+    turn_ip: <%= node['ipaddress'] %>
     turn_min_port: <%= @turn_min_port %>
     turn_max_port: <%= @turn_max_port %>
 
@@ -223,7 +223,20 @@ modules:
     versioning: true
     store_current_id: true
   mod_shared_roster: {}
-  mod_stun_disco: {}
+  mod_stun_disco:
+   services:
+     -
+       host: <%= node['ipaddress'] %>
+       port: 3478
+       type: stun
+       transport: udp
+       restricted: false
+     -
+       host: <%= node['ipaddress'] %>
+       port: 3478
+       type: turn
+       transport: udp
+       restricted: true
   mod_vcard:
     search: false
   mod_vcard_xupdate: {}