Deps: update Netty to 4.1.109

[mykaul]

Fixes: #288

[mykaul]

It's failing against Cassandra, with NPEs and such - is that a stable CI (and my change here is responsible for it) ?

[roydahan]

@Bouncheck / @k0machi are these 2 failures known to us (they look familiar to me):

Error:  Failures: 
Error:    DefaultLoadBalancingPolicyIT.should_apply_node_filter:252 expected:<[4]> but was:<[3]>
Error:    DefaultLoadBalancingPolicyIT.should_use_round_robin_on_local_dc_when_not_enough_routing_information:140 expected:<...e(endPoint=/127.0.0.[2:9042, hostId=6e3517ea-3c17-4fac-bdb2-707bcb488050, hashCode=1d6df1a4])> but was:<...e(endPoint=/127.0.0.[1:9042, hostId=9fdc4d7d-7a54-4971-a977-9544b4fef53b, hashCode=13aa0da1])>
[INFO] 

[mykaul]

@Bouncheck , @roydahan - anything I need to do here to move forward?

[roydahan]

@mykaul no, it's on @Bouncheck.

[Bouncheck]

Change itself LGTM. The DefaultLoadBalancingPolicyIT failures are flaky and seem to have common cause which is one of the nodes failing. This causes expected outputs in both methods to be different.