Move tendermint consensus config overrides (celestiaorg#1012)

Addresses
celestiaorg#669 (comment)
by copying the consensus config overrides from celestiaorg/cosmos-sdk.

This PR should be merged in parallel with
celestiaorg/cosmos-sdk#284

Co-authored-by: Evan Forbes <42654277+evan-forbes@users.noreply.github.com>

cmd/celestia-appd/cmd/root.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"io"
 	"os"
+	"time"
 
 	"github.com/celestiaorg/celestia-app/app"
 	"github.com/celestiaorg/celestia-app/app/encoding"
@@ -82,6 +83,9 @@ func NewRootCmd() *cobra.Command {
 			tmCfg.Mempool.TTLNumBlocks = 10
 			tmCfg.Mempool.MaxTxBytes = 2 * 1024 * 1024 // 2 MiB
 			tmCfg.Mempool.Version = "v1"               // prioritized mempool
+			tmCfg.Consensus.TimeoutPropose = time.Second * 10
+			tmCfg.Consensus.TimeoutCommit = time.Second * 8
+			tmCfg.Consensus.SkipTimeoutCommit = false
 
 			customAppTemplate, customAppConfig := initAppConfig()
 			return server.InterceptConfigsPreRunHandler(cmd, customAppTemplate, customAppConfig, tmCfg)