message: [smoke test] fix flaky vfn failover test
  Closes:
diff: @@ -159,8 +159,8 @@ fn test_full_node_basic_flow() {
  #[test]
  fn test_vfn_failover() {
  - // launch environment of 4 validator nodes and 2 full nodes
  - let mut env = SmokeTestEnvironment::new(4);
  + // launch environment of 6 validator nodes and 2 full nodes
  + let mut env = SmokeTestEnvironment::new(6);
  env.setup_vfn_swarm();
  env.setup_public_fn_swarm(1);
  env.validator_swarm.launch();
  