RtGistCommentTest.java:57-59: Apply this rule to all other classes...

The puzzle `1017-59643c80` in [`src/test/java/com/jcabi/github/RtGistCommentTest.java`](https://github.com/jcabi/jcabi-github/blob/master/src/test/java/com/jcabi/github/RtGistCommentTest.java) (lines 57-59) has to be resolved: Apply this rule to all other classes that use MkGrizzlyContainer and make MkGrizzlyContainers use port() given by this resource to avoid tests fail with BindException.

The puzzle was created by Igor Piddubnyi on 15-Jan-16.

Estimate: 30 minutes, role: IMP.

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).