to org.springframework.cloud from org.springframework.cloud.contract
also stopped running an http server if the contract doesn't support it
added back stub runner modules
User can depend on spring-cloud-contract-wiremock and
spring-cloud-starter-web (or tomcat) to get tomcat to run
the wiremock server. The idea is that wiremock runs in the
"ambient" server from Sprign Boot. So far we only support
Tomcat (should be easy to extend).
See tests in spring-cloud-contract-wiremock for details.
