message: Make minimum_era_height random in HighwayConfig::random.
diff: @@ -210,7 +210,7 @@ impl HighwayConfig {
  HighwayConfig {
  genesis_era_start_timestamp: Timestamp::random(rng),
  era_duration: Duration::from_millis(rng.gen_range(600_000, 604_800_000)),
  - minimum_era_height: 10,
  + minimum_era_height: rng.gen_range(5, 100),
  booking_duration: Duration::from_millis(rng.gen_range(600_000, 864_000_000)),
  entropy_duration: Duration::from_millis(rng.gen_range(600_000, 10_800_000)),
  voting_period_duration: Duration::from_millis(rng.gen_range(600_000, 172_800_000)),
  