The modifications in this commit should be part of the previous one
(42ea54c2d03b81a4c2631bf8bb142aeb428f01dd), but due to my mistake were not
added to the change set.
Merge pull request #208 from tbak/2.x

The modifications in this commit should be part of the previous one
Upgrade to latest ribbon/rxnetty/karyon version
(2.0-RC9, 0.3.13, 2.1.00-RC5 respectively).
Merge pull request #209 from tbak/2.x

Upgrade to latest ribbon/rxnetty/karyon version