Parquet file containing arrays, written by Parquet-MR, cannot be read again by Parquet-MR

In the attached files, there is one original file, and one written modified file that results after reading the original file and writing it back with Parquet-MR, with a few values modified. The schema should not be modified, since the schema of the input file is used as the schema to write the output file. However, the output file has a slightly modified schema that then cannot be read back the same way again with Parquet-MR, resulting in the exception message:  java.lang.ClassCastException: optional binary element (STRING) is not a group

My guess is that the issue lies in the Avro schema conversion.

The Parquet files attached have some arrays and some nested fields.

**Environment**: Windows 10
**Reporter**: [Devon Kozenieski](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=devonk)
#### Related issues:
- [parquet schema conflict: optional binary (UTF8) is not a group](https://issues.apache.org/jira/browse/HUDI-864) (is depended upon by)
#### Original Issue Attachments:
- [modified.parquet](https://issues.apache.org/jira/secure/attachment/13030885/modified.parquet)
- [original.parquet](https://issues.apache.org/jira/secure/attachment/13030884/original.parquet)
- [parquet-diff.png](https://issues.apache.org/jira/secure/attachment/13042124/parquet-diff.png)

_{**Note**: *This issue was originally created as [PARQUET-2069](https://issues.apache.org/jira/browse/PARQUET-2069). Please see the [migration documentation](https://issues.apache.org/jira/browse/PARQUET-2502) for further details.*}

まず、添付された original.parquet と modified.parquet ファイルを比較し、次に、Parquet-MR がネストされた配列を読み取り、再書き込みするときに使用する Avro スキーマ変換を追跡してください。書き直されたファイルの読み取り時に ClassCastException を再現してください。スキーマの互換性が維持され、出力を Parquet-MR で再度読み取れるようになれば完了です。

索引モデルが issue の本文から書いたものです。