HDFS-17707. TestStateStoreFileSystem fails after HDFS-17496.

Author: hfutatzhanghb

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/FileIoProvider.java

@@ -687,6 +687,7 @@ public void mkdirsWithExistsCheck(
     try {
       faultInjectorEventHook.beforeMetadataOp(volume, MKDIRS);
       succeeded = dir.isDirectory() || dir.mkdirs();
+      succeeded = succeeded || dir.isDirectory();
       profilingEventHook.afterMetadataOp(volume, MKDIRS, begin);
     } catch(Exception e) {
       onFailure(volume, begin);