Versions where updated in documentation that is included in the
generation of our reference documentation.
Also, to clean up version management within the samples, the
spring-cloud-task-dependencies was introduced into each pom so that
versions are managed at that level.
Updated a version number
* Added test for sample and cleanup
* Added skipEventsListener
* Added new message format.
* Added integration tests.
* Updated application.properties to add json content type
resolvesspring-cloud/spring-cloud-task#119