Bump Netty to 4.1.84

Bump Netty to 4.1.84

https://netty.io/news/2022/05/06/2-1-77-Final.html
https://netty.io/news/2022/06/14/4-1-78-Final.html
https://netty.io/news/2022/07/11/4-1-79-Final.html
https://netty.io/news/2022/08/26/4-1-80-Final.html
https://netty.io/news/2022/09/08/4-1-81-Final.html
https://netty.io/news/2022/09/13/4-1-82-Final.html
https://netty.io/news/2022/10/11/4-1-84-Final.html

We also switch off the aarch64 epoll support, as it does not work in
OSGi.

Change-Id: I87796b92938bb7224ee33578b0d076c90b4f69c9
Signed-off-by: Robert Varga <robert.varga@pantheon.tech>