etcd: format import order

golang CodeReviewComments:
https://github.com/golang/go/wiki/CodeReviewComments#imports

Signed-off-by: demoManito <1430482733@qq.com>

client/v2/README.md

@@ -18,11 +18,11 @@ go get go.etcd.io/etcd/v3/client
 package main
 
 import (
-	"log"
-	"time"
-	"context"
-
-	"go.etcd.io/etcd/v3/client"
+    "context"
+    "log"
+    "time"
+    
+    "go.etcd.io/etcd/v3/client"
 )
 
 func main() {

client/v3/kv.go

@@ -16,11 +16,11 @@ package clientv3
 
 import (
 	"context"
-	"go.etcd.io/etcd/api/v3/v3rpc/rpctypes"
-
-	pb "go.etcd.io/etcd/api/v3/etcdserverpb"
 
 	"google.golang.org/grpc"
+
+	pb "go.etcd.io/etcd/api/v3/etcdserverpb"
+	"go.etcd.io/etcd/api/v3/v3rpc/rpctypes"
 )
 
 type (

client/v3/retry_interceptor_test.go

@@ -1,10 +1,12 @@
 package clientv3
 
 import (
+	"testing"
+
+	grpccredentials "google.golang.org/grpc/credentials"
+
 	"go.etcd.io/etcd/api/v3/v3rpc/rpctypes"
 	"go.etcd.io/etcd/client/v3/credentials"
-	grpccredentials "google.golang.org/grpc/credentials"
-	"testing"
 )
 
 type dummyAuthTokenBundle struct{}

contrib/raftexample/raft_test.go

@@ -15,9 +15,10 @@
 package main
 
 import (
-	"go.etcd.io/etcd/raft/v3/raftpb"
 	"reflect"
 	"testing"
+
+	"go.etcd.io/etcd/raft/v3/raftpb"
 )
 
 func TestProcessMessages(t *testing.T) {

server/etcdserver/api/v3discovery/discovery.go

@@ -19,7 +19,6 @@ package v3discovery
 import (
 	"context"
 	"errors"
-
 	"math"
 	"path"
 	"sort"
@@ -27,11 +26,11 @@ import (
 	"strings"
 	"time"
 
-	"go.etcd.io/etcd/client/pkg/v3/types"
-	"go.etcd.io/etcd/client/v3"
-
 	"github.com/jonboulle/clockwork"
 	"go.uber.org/zap"
+
+	"go.etcd.io/etcd/client/pkg/v3/types"
+	clientv3 "go.etcd.io/etcd/client/v3"
 )
 
 const (

server/etcdserver/api/v3rpc/key_test.go

@@ -15,9 +15,10 @@
 package v3rpc
 
 import (
+	"testing"
+
 	pb "go.etcd.io/etcd/api/v3/etcdserverpb"
 	"go.etcd.io/etcd/api/v3/v3rpc/rpctypes"
-	"testing"
 )
 
 func TestCheckRangeRequest(t *testing.T) {

tests/integration/v3_failover_test.go

@@ -18,14 +18,15 @@ import (
 	"bytes"
 	"context"
 	"crypto/tls"
-	"go.etcd.io/etcd/api/v3/v3rpc/rpctypes"
-	clientv3test "go.etcd.io/etcd/tests/v3/integration/clientv3"
 	"testing"
 	"time"
 
-	"go.etcd.io/etcd/client/v3"
-	integration2 "go.etcd.io/etcd/tests/v3/framework/integration"
 	"google.golang.org/grpc"
+
+	"go.etcd.io/etcd/api/v3/v3rpc/rpctypes"
+	clientv3 "go.etcd.io/etcd/client/v3"
+	integration2 "go.etcd.io/etcd/tests/v3/framework/integration"
+	clientv3test "go.etcd.io/etcd/tests/v3/integration/clientv3"
 )
 
 func TestFailover(t *testing.T) {