fix ut

Author: yaooqinn

sql/hive/src/main/scala/org/apache/spark/sql/hive/client/HiveClientImpl.scala

@@ -574,7 +574,7 @@ private[hive] class HiveClientImpl(
     // If users explicitly alter these Hive-specific properties through ALTER TABLE DDL, we respect
     // these user-specified values.
     verifyColumnDataType(table.dataSchema)
-    val owner = if (StringUtils.isEmpty(table.owner)) userName else table.owner
+    val owner = Option(table.owner).filter(_.nonEmpty).getOrElse(userName)
     val hiveTable = toHiveTable(
       table.copy(properties = table.ignoredProperties ++ table.properties), Some(owner))
     // Do not use `table.qualifiedName` here because this may be a rename