parquet-cascading Add Parquet Avro Scheme

At the moment using parquet-cascading writing Parquet files when using Avro as the object format is not possible as a Schema is not yet provided.

As part of this ticket, a ParquetAvroScheme will be introduced, and also a local.ParquetAvroScheme , so that from Cascading / Scalding developers can read / write and test in both --hdfs and --local mode Parquet-Avro files.

**Reporter**: [Antonios Chalkiopoulos](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=antwnis) / @Antwnis
**Assignee**: [Antonios Chalkiopoulos](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=antwnis) / @Antwnis

_{**Note**: *This issue was originally created as [PARQUET-198](https://issues.apache.org/jira/browse/PARQUET-198). Please see the [migration documentation](https://issues.apache.org/jira/browse/PARQUET-2502) for further details.*}

Comienza localizando las implementaciones de Scheme de parquet-cascading y sus equivalentes de esquema local, y luego identifica cómo Cascading y Scalding gestionan los formatos de objetos Avro. Añade las implementaciones solicitadas ParquetAvroScheme y local.ParquetAvroScheme, con cobertura para leer, escribir y probar archivos Parquet-Avro en los modos HDFS y local.

Escrito por el modelo de indexación a partir del texto del issue.