An expected-type error in spring-integration-mqtt-4.0.xsd on line:203.

It seems the type of client-factory should be org.springframework.integration.mqtt.core.MqttPahoClientFactory, not org.springframework.integration.mqtt.support.MqttMessageConverter.

This will cause a validation error when using configuration like http://docs.spring.io/spring-integration/docs/4.0.4.RELEASE/reference/html/mqtt.html