VOL-2367: Lack of ONU Down Indication breaks onu reboot/fiber disconnect

- Use BCMOLT_ONU_AUTO_SUBGROUP_ONU_ACTIVATION_COMPLETED and
  BCMOLT_ONU_AUTO_SUBGROUP_ONU_DEACTIVATION_COMPLETED messages for
  determining onu oper_status "up" and "down" respectively per BAL3.1.

Change-Id: I0332de9dee456415233e803fd0e42302b7117229
diff --git a/agent/src/translation.h b/agent/src/translation.h
index b4d8b90..4a65654 100644
--- a/agent/src/translation.h
+++ b/agent/src/translation.h
@@ -25,5 +25,6 @@
 int interface_key_to_port_no(bcmolt_interface_id intf_id, 
         bcmolt_interface_type intf_type);
 std::string alarm_status_to_string(bcmolt_status status);
+std::string bcmolt_result_to_string(bcmolt_result result);
 
 #endif