PAE controller now removes keys from MAC on stop (ifdown)

Previously, the old keys were still present on MAC on next bootstrap.

Author: Mika Leppänen

source/6LoWPAN/ws/ws_pae_controller.c

@@ -704,6 +704,9 @@ int8_t ws_pae_controller_stop(protocol_interface_info_entry_t *interface_ptr)
     // Stores frame counter
     ws_pae_controller_frame_counter_store(controller);
 
+    // Removes network keys from PAE controller and MAC
+    ws_pae_controller_nw_keys_remove(interface_ptr);
+
     // If PAE has been initialized, deletes it
     if (controller->pae_delete) {
         controller->pae_delete(interface_ptr);