change default kind value of azure disk pv

make a const for default azure disk kind

pkg/volume/azure_dd/azure_common.go

@@ -37,6 +37,7 @@ import (
 const (
 	defaultFSType             = "ext4"
 	defaultStorageAccountType = storage.StandardLRS
+	defaultAzureDiskKind      = v1.AzureSharedBlobDisk
 )
 
 type dataDisk struct {
@@ -116,7 +117,7 @@ func normalizeFsType(fsType string) string {
 
 func normalizeKind(kind string) (v1.AzureDataDiskKind, error) {
 	if kind == "" {
-		return v1.AzureDedicatedBlobDisk, nil
+		return defaultAzureDiskKind, nil
 	}
 
 	if !supportedDiskKinds.Has(kind) {