This commit deprecates the `ws` starter in favour of a new `web-services`
starter. A deprecation warning auto-configuration has also been added to
the ws starter.
Closes gh-5711
Rename spring-boot-starter-webservices back to spring-boot-starter-ws.
Unfortunately the starter exists in Spring Boot 1.3 so we can't rename
it without consequence.
See gh-5711
Stephane Nicoll
Phillip Webb
Andy Wilkinson
Marten Deinum