wip - fix challenge period

Author: ltfschoen

node/src/chain_spec.rs

@@ -947,6 +947,7 @@ fn testnet_genesis(
             min_bonded_dhx_daily_default: TEN, // 10 DHX
             min_mpower_daily: 5u128,
             min_mpower_daily_default: 5u128,
+            challenge_period_days: 7u64,
             cooling_off_period_days: 7u32,
             cooling_off_period_days_remaining: vec![
                 (
@@ -1091,6 +1092,7 @@ fn mainnet_genesis(
             min_bonded_dhx_daily_default: TEN, // 10 DHX
             min_mpower_daily: 5u128,
             min_mpower_daily_default: 5u128,
+            challenge_period_days: 7u64,
             cooling_off_period_days: 7u32,
             cooling_off_period_days_remaining: vec![
                 (