Start sending PAS message after EAPOL parent TX fails.

restarts the PAS trickle. Tries not to send PAS if there is potential
parents available.

Author: Mika Tervonen

source/6LoWPAN/ws/ws_bootstrap.c

@@ -2506,6 +2506,12 @@ static void ws_bootstrap_authentication_completed(protocol_interface_info_entry_
         ws_bootstrap_candidate_parent_free(cur, target_eui_64);
         // Go back for network scanning
         ws_bootstrap_state_change(cur, ER_ACTIVE_SCAN);
+
+        // Start PAS interval between imin - imax.
+        cur->ws_info->trickle_pas_running = true;
+        trickle_start(&cur->ws_info->trickle_pan_advertisement_solicit, &cur->ws_info->trickle_params_pan_discovery);
+
+        // Parent selection is made before imin/2 so if there is parent candidates solicit is not sent
         cur->bootsrap_state_machine_cnt = randLIB_get_random_in_range(10, cur->ws_info->trickle_params_pan_discovery.Imin >> 1);
         tr_info("Making parent selection in %u s", (cur->bootsrap_state_machine_cnt / 10));
     } else {