camel-servlet-starter - Autoconfigure Servlet Endpoint

It might be useful to autoconfigure the Camel-servlet-starter component to automatically bind the rest endpoints under the "/camel/*" path by default.

A similar approach has been taken here: https://github.com/fabric8-quickstarts/spring-boot-camel-rest-sql/blob/master/src/main/java/io/fabric8/quickstarts/camel/Application.java#L37-L43