vty: fix: missing default cmds at hlr node

Without this, it is impossible to exit the 'hlr' node.

Change-Id: I53e572194af39a431c54f83cd07e4c41c6fdf7f8

src/libmsc/vty_interface_layer3.c

@@ -971,6 +971,7 @@ int bsc_vty_init_extra(void)
 
 	install_element(CONFIG_NODE, &cfg_hlr_cmd);
 	install_node(&hlr_node, config_write_hlr);
+	vty_install_default(HLR_NODE);
 	install_element(HLR_NODE, &cfg_hlr_remote_ip_cmd);
 	install_element(HLR_NODE, &cfg_hlr_remote_port_cmd);