replace errors.go with github.com/pkg/errors (1/2) (#3888)

* (1/2) of replace errors.go with github.com/pkg/errors

ref #3862

- step one in removing instances of errors.go in favor of github.com/pkg/errors

Signed-off-by: Marko Baricevic <marbar3778@yahoo.com>

* gofmt

* add in /store

p2p/switch.go

@@ -222,7 +222,7 @@ func (sw *Switch) OnStart() error {
 	for _, reactor := range sw.reactors {
 		err := reactor.Start()
 		if err != nil {
-			return cmn.ErrorWrap(err, "failed to start %v", reactor)
+			return errors.Wrapf(err, "failed to start %v", reactor)
 		}
 	}
 

p2p/test_util.go

@@ -5,6 +5,8 @@ import (
 	"net"
 	"time"
 
+	"github.com/pkg/errors"
+
 	"github.com/tendermint/tendermint/crypto"
 	"github.com/tendermint/tendermint/crypto/ed25519"
 	cmn "github.com/tendermint/tendermint/libs/common"
@@ -233,7 +235,7 @@ func testPeerConn(
 	// Encrypt connection
 	conn, err = upgradeSecretConn(conn, cfg.HandshakeTimeout, ourNodePrivKey)
 	if err != nil {
-		return pc, cmn.ErrorWrap(err, "Error creating peer")
+		return pc, errors.Wrap(err, "Error creating peer")
 	}
 
 	// Only the information we already have