before this change the support for Stub Runner Boot with Service Discovery was pretty useless since Stub Runner stubbed service discovery. That makes a lot of sense in unit / integration tests but not when you want to do some version of end to end tests.
With this change you can pass a property to enable automated registration of stubs in Service Discovery.
Technical changes:
* Added Zookeeper registration
* Added Eureka registration
* Added Consul registration
* Added checkstyle plugin - fixed part of exceptions
In a Spring test user can add this annotation to run stubs
rather than rely on auto configuration (which might not be
welcome outside a test).
Fixes gh-33
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.
