Use org.springframework.boot instead of ${project.groupId}
groupId in order to make it easier to use spring-boot-samples
modules as a starting point for new projects.
The RC1 version had some websocket issues, that prevented propper websocket communication.
In some cases the SocketJS communication was downgraded to 'xhr_streaming'.
Opinionated defaults for WebSockets:
* If spring-websocket is on the classpath and so is
the Tomcat WSci initializer then it is added to the context
* A DefaultSockJsService is added if none is present
* User has only to define @Beans of type WebSocketHandler with
name starting "/"
* Each one is converted to a SockJsHttpRequestHandler and
mapped to "/<beanName>/**"
Sebastien Deleuze
Spring Buildmaster
Phillip Webb
Dave Syer
Ulrich von Poblotzki
Phillip Webb