CI: test with burst traffic
We should have a short sanity check which replays burst traffic to kresd for limited amount of time (e.g. couple minutes) to make sure it does not crash under heavy load.
Proposal:
- add Drool into CI Docker image
- prepare PCAP file with limited amount of traffic taken from CZ.NIC's public resolver
- replay traffic using Drool's strategy
timing ignore
so it is replayed as fast as possible - test whether kresd crashed or not