Update Thread publishing during address change (#1581)

Pending request is cancelled if device address has changed. Following
publish will trigger new a/sd.

Author: Arto Kinnunen

source/6LoWPAN/Thread/thread_bootstrap.c

@@ -1010,13 +1010,7 @@ void thread_tasklet(arm_event_s *event)
             thread_bootstrap_child_id_request(cur);
             if (thread_nd_own_service_list_data_size(&cur->thread_info->localServerDataBase)) {
                 // publish our services to allow leader to remove old ones
-                if (!cur->thread_info->localServerDataBase.publish_active) {
-                    /*
-                     * publish only when publish is not active, otherwise let resubmit timer check
-                     * handle publish after short time period.
-                     */
-                    thread_border_router_publish(cur->id);
-                }
+                thread_border_router_publish(cur->id);
             }
             thread_router_bootstrap_address_change_notify_send(cur);
             // Validate network data after a short period

source/6LoWPAN/Thread/thread_border_router_api.c

@@ -887,8 +887,12 @@ int thread_border_router_publish(int8_t interface_id)
         if (rloc16 != cur->thread_info->localServerDataBase.registered_rloc16) {
             /*
              * Device short address has changed, cancel previous a/sd and a/as requests
+             * and start resubmit timer
              * */
+            tr_debug("address changed, kill pending reuqests");
             thread_management_client_pending_coap_request_kill(cur->id);
+            thread_border_router_resubmit_timer_set(interface_id, 5);
+            return 0;
         } else {
             cur->thread_info->localServerDataBase.publish_pending = true;
             tr_debug("Activate pending status for publish");