RtImagesITCase.java:69-72: To have multiple controlled...

The puzzle `187-99b12eee` from #187 has to be resolved:

https://github.com/amihaiemil/docker-java-api/blob/adec112b22042776d6dfd36ade12db8694fc0b17/src/test/java/com/amihaiemil/docker/RtImagesITCase.java#L69-L72

The puzzle was created by @amihaiemil on 17-Dec-19.

Estimate: 30 minutes, role: DEV.

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).