JCLOUDS-750 Start using AutoValue on Docker.

this builds on https://github.com/jclouds/jclouds/pull/586 and depends on it.
That looks like a latent typo on the serialized name field. No test exists
to confirm or refute except we could look at docker docs or code.

Would be weird that the caseformat is different on input vs output, right?

If in the odd case input is imageId and output is ImageId, then yeah...
this wouldn't work.