Spring Cloud Stream pause endpoint check

1. Make sure there are Kafka and Zookeeper running on localhost:9092 and localhost:2181 with sleuth_topic created (can be adjusted in demo/src/main/java/resources/application.yml)
2. Run mvn spring-boot:run from demo
3. Try curl -X POST localhost:8081/pause and check demo logs for "Lifecycle Bean stopped" message (no message).
4. Remove all Sleuth and Cloud Stream related dependencies from demo/pom.xml
5. Rerun demo and try curl -X POST localhost:8081/pause again. Check logs for "Lifecycle Bean stopped" (present).