Images.java:44-47: Add Fake implementations of Images and...

The puzzle `152-6918ce7a` from #152 has to be resolved:

https://github.com/amihaiemil/docker-java-api/blob/ab0d78ec783de53306d63a66dd459598d58dc8c4/src/main/java/com/amihaiemil/docker/Images.java#L44-L47

The puzzle was created by amihaiemil on 26-Aug-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).

Start by reading Images.java lines 44-47 and the referenced puzzle from issue #152. Determine what remains unresolved there, then verify the project tests; the work is done when the problem is fixed and the puzzle text has been removed from the source code.

Written by the indexing model from the issue text.