Fix testnet config for staking (#2182)

* Add one-off block verification rule for beacon chain bad block

* Add more comment

* Fix testnet config

Author: rlan35

Diff for: internal/configs/sharding/testnet.go

@@ -27,7 +27,7 @@ const (
 
 func (testnetSchedule) InstanceForEpoch(epoch *big.Int) Instance {
 	switch {
-	case epoch.Cmp(params.PangaeaChainConfig.StakingEpoch) >= 0:
+	case epoch.Cmp(params.TestnetChainConfig.StakingEpoch) >= 0:
 		return testnetV1
 	default: // genesis
 		return testnetV0
@@ -77,8 +77,8 @@ func (ts testnetSchedule) GetShardingStructure(numShard, shardID int) []map[stri
 
 var testnetReshardingEpoch = []*big.Int{
 	big.NewInt(0),
-	params.PangaeaChainConfig.StakingEpoch,
+	params.TestnetChainConfig.StakingEpoch,
 }
 
 var testnetV0 = MustNewInstance(3, 10, 7, genesis.TNHarmonyAccounts, genesis.TNFoundationalAccounts, testnetReshardingEpoch, TestnetSchedule.BlocksPerEpoch())
-var testnetV1 = MustNewInstance(3, 10, 3, genesis.TNHarmonyAccounts, genesis.TNFoundationalAccounts, testnetReshardingEpoch, TestnetSchedule.BlocksPerEpoch())
+var testnetV1 = MustNewInstance(3, 20, 7, genesis.TNHarmonyAccounts, genesis.TNFoundationalAccounts, testnetReshardingEpoch, TestnetSchedule.BlocksPerEpoch())