Performing etag off of bytes rather than md5 string

pkg/api/minioapi/response.go

@@ -90,7 +90,8 @@ func generateObjectsListResult(bucket string, objects []mstorage.ObjectMetadata,
 		}
 		content.Key = object.Key
 		content.LastModified = object.Created.Format(iso8601Format)
-		content.ETag = hex.EncodeToString([]byte(object.Md5))
+		md5Bytes, _ := hex.DecodeString(object.Md5)
+		content.ETag = hex.EncodeToString(md5Bytes)
 		content.Size = object.Size
 		content.StorageClass = "STANDARD"
 		content.Owner = owner