Sample of usage Parquet-1396 and Parquet-1178 for column level encryption with pluggable key access

This Jira provides a sample to use Parquet-1396 and Parquet-1178 column level encryption with pluggable key access. The Spark SQL application shows how to configure Parquet-1396 to encrypt and columns. The project CryptoMetadataRetriever shows how to implement the interface defined in Parquet-1396 as an example. 

The project to be uploaded soon. 

**Reporter**: [Xinli Shang](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=shangx@uber.com) / @shangxinli
#### Related issues:
- [EncryptionPropertiesFactory and DecryptionPropertiesFactory](https://github.com/apache/parquet-java/issues/2220) (Blocked)
- [Passing Field Metadata to Parquet](https://issues.apache.org/jira/browse/SPARK-25858) (Blocked)
- [Parquet modular encryption](https://github.com/apache/parquet-java/issues/2110) (depends upon)
#### Externally tracked issue: [https://github.com/apache/parquet-java/issues/2220](https://github.com/apache/parquet-java/issues/2220)

_{**Note**: *This issue was originally created as [PARQUET-1397](https://issues.apache.org/jira/browse/PARQUET-1397). Please see the [migration documentation](https://issues.apache.org/jira/browse/PARQUET-2502) for further details.*}

Commencez par lire Parquet-1396 et Parquet-1178, puis examinez les issues associées bloquées 2220 et SPARK-25858 ainsi que l’issue dépendante 2110. L’issue indique qu’une application Spark SQL et un projet CryptoMetadataRetriever doivent démontrer la configuration du chiffrement et l’implémentation de l’interface, mais le projet n’est pas encore joint. Le travail est terminé lorsque le projet d’exemple est téléversé et documente les deux chemins d’utilisation.

Rédigé par le modèle d'indexation à partir du texte de l'issue.