Fix goimports

provisioner.go

@@ -11,10 +11,9 @@ import (
 	"time"
 
 	"github.com/Sirupsen/logrus"
-	"github.com/pkg/errors"
-
 	pvController "github.com/kubernetes-incubator/external-storage/lib/controller"
-	"k8s.io/api/core/v1"
+	"github.com/pkg/errors"
+	v1 "k8s.io/api/core/v1"
 	k8serror "k8s.io/apimachinery/pkg/api/errors"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	clientset "k8s.io/client-go/kubernetes"