Support validation against Avro schemas when reading Avro files

Filesystem Plugin supports multiple type of file formats like

• json
• avro
• text (csv|psv|tsv)
• parquet

and can support any type of file formats.

Among these file formats, some of the file formats are schema based like
avro and parquet and some of them are schema less like json.

For schema based file formats, Drill should have capability to validate the query against file schema, before start executing the query.