[SPARK-15979][SQL] Rename various Parquet support classes.

## What changes were proposed in this pull request?
This patch renames various Parquet support classes from CatalystAbc to ParquetAbc. This new naming makes more sense for two reasons:

1. These are not optimizer related (i.e. Catalyst) classes.
2. We are in the Spark code base, and as a result it'd be more clear to call out these are Parquet support classes, rather than some Spark classes.

## How was this patch tested?
Renamed test cases as well.

Author: Reynold Xin <rxin@databricks.com>

Closes #13696 from rxin/parquet-rename.