JCLOUDS-750 Start using AutoValue on Docker.

this builds on https://github.com/jclouds/jclouds/pull/586 and depends on it.
It seems the naming was OK: https://docs.docker.com/reference/api/docker_remote_api_v1.12/#create-a-container
I've quickly checked the latest version of the API and the naming hasn't changed.
Worth renaming the fields, even if they logo ugly, to keep the serialization based on the naming configuration?