message: [cluster-test] Disable recovery experiment by default
  Can be enabled with env var
  Closes:
  Approved by: andll
diff: #![forbid(unsafe_code)]
  use std::cmp::min;
  +use std::env;
  use crate::experiments::ExperimentParam;
  use crate::{
  @@ -21,12 +22,14 @@ pub struct ExperimentSuite {
  impl ExperimentSuite {
  pub fn new_pre_release(cluster: &Cluster) -> Self {
  let mut experiments: Vec<Box<dyn Experiment>> = vec![];
  + if env::var("RECOVERY_EXP").is_ok() {
  experiments.push(Box::new(
  RecoveryTimeParams {
  num_accounts_to_mint: 100_000,
  }
  .build(cluster),
  ));
  + }
  let count = min(3, cluster.instances().len() / 3);
  // Reboot different sets of 3 validators *100 times
  for _ in 0..10 {
  