Here is a plan for this:
1. Add parquet-testdata submodule under parquet-mr that has utils and original csv files. "generate-resources" phase will bundle these csvs and generated parquet files into a jar (eg- parquet-testdata-1.0.0-SNAPSHOT.jar) and publish it to maven repo.
2. parquet-compatibility depends on one or "more" (I have not found a way to figure this out) versions of parquet-testdata-*.jar and uses it for backwards compatibility tests.
3. We need to find a way to generate files for impala. Should that be a project under parquet-mr: parquet-impala or impala itself (and similar way as ours)?