RtContainer.java:42-44: Continue implementing the rest of...

The puzzle `97-657d9f49` from #97 has to be resolved:

https://github.com/amihaiemil/docker-java-api/blob/ab0d78ec783de53306d63a66dd459598d58dc8c4/src/main/java/com/amihaiemil/docker/RtContainer.java#L42-L44

The puzzle was created by amihaiemil on 10-May-18.

If you have any technical questions, don't ask me, submit new tickets instead. The task will be \"done\" when the problem is fixed and the text of the puzzle is _removed_ from the source code. Here is more about [PDD](http://www.yegor256.com/2009/03/04/pdd.html) and [about me](http://www.yegor256.com/2017/04/05/pdd-in-action.html).