Move util/validation files to their own package

pkg/volume/plugins.go

@@ -26,9 +26,9 @@ import (
 	client "k8s.io/kubernetes/pkg/client/unversioned"
 	"k8s.io/kubernetes/pkg/cloudprovider"
 	"k8s.io/kubernetes/pkg/types"
-	"k8s.io/kubernetes/pkg/util"
 	"k8s.io/kubernetes/pkg/util/errors"
 	"k8s.io/kubernetes/pkg/util/mount"
+	"k8s.io/kubernetes/pkg/util/validation"
 )
 
 // VolumeOptions contains option information about a volume.
@@ -203,7 +203,7 @@ func (pm *VolumePluginMgr) InitPlugins(plugins []VolumePlugin, host VolumeHost)
 	allErrs := []error{}
 	for _, plugin := range plugins {
 		name := plugin.Name()
-		if !util.IsQualifiedName(name) {
+		if !validation.IsQualifiedName(name) {
 			allErrs = append(allErrs, fmt.Errorf("volume plugin has invalid name: %#v", plugin))
 			continue
 		}