sensor_alert関連修正
sensor_alert関連修正

ossforumjp-app-IoT/rubyiot_server,constdrop/rubyiot_server,miyohide/rubyiot_server,ossforumjp-app-IoT/rubyiot_server,constdrop/rubyiot_server,ossforumjp-app-IoT/rubyiot_server,constdrop/rubyiot_server,miyohide/rubyiot_server,miyohide/rubyiot_server,constdrop/rubyiot_server