Fix goimports errors

It turns out we werent running verify-goimports in our CI jobs.

While we work to get that enabled, we can at least unblock the releases by doing a one-time fix of the failing goimports

cmd/kops/rollingupdatecluster.go

@@ -19,12 +19,13 @@ package main
 import (
 	"fmt"
 	"io"
-	"k8s.io/kops/pkg/validation"
 	"os"
 	"strconv"
 	"strings"
 	"time"
 
+	"k8s.io/kops/pkg/validation"
+
 	"github.com/spf13/cobra"
 	v1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"

pkg/instancegroups/rollingupdate.go

@@ -18,10 +18,11 @@ package instancegroups
 
 import (
 	"fmt"
-	"k8s.io/kops/pkg/validation"
 	"sync"
 	"time"
 
+	"k8s.io/kops/pkg/validation"
+
 	"k8s.io/client-go/kubernetes"
 	"k8s.io/klog"
 	api "k8s.io/kops/pkg/apis/kops"

pkg/instancegroups/rollingupdate_test.go

@@ -18,10 +18,11 @@ package instancegroups
 
 import (
 	"errors"
-	"k8s.io/kops/pkg/validation"
 	"testing"
 	"time"
 
+	"k8s.io/kops/pkg/validation"
+
 	"github.com/aws/aws-sdk-go/aws"
 	"github.com/aws/aws-sdk-go/service/autoscaling"