Refactor ServerResolver (contract update) + use ocelli as internal LB.
Rename package eureka-extensions to eureka-contrib.
Ocelli contrib package.
Merge remote-tracking branch 'remotes/netflix/2.x' into 2.x
Merge pull request #302 from tbak/2.x

2.x update
Extract eureka-testkit module out of eureka-test-utils.
Merge pull request #303 from tbak/2.x

2.x Extract eureka-testkit module out of eureka-test-utils.