0.5.x - update to netty 4.1.0.Beta7
0.5.x - update to netty 4.1.0.Beta7

I think netty 4225 might be related to the travis
issues we see.

ReactiveX/RxNetty,NiteshKant/RxNetty,brharrington/RxNetty,NiteshKant/RxNetty,ReactiveX/RxNetty,brharrington/RxNetty,brharrington/RxNetty,NiteshKant/RxNetty,ReactiveX/RxNetty