Improve Parquet Protobuf Usability

Check out the PR for details.

 
- Move away from passing around a `Class` object to take advantage of Java Templating
- Make parquet-proto library more usable and straight-forward
- Provide test examples
- Limited support for protocol buffer schema registry

 

**Reporter**: [David Mollitor](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=belugabehr) / @belugabehr
**Assignee**: [David Mollitor](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=belugabehr) / @belugabehr

_{**Note**: *This issue was originally created as [PARQUET-1903](https://issues.apache.org/jira/browse/PARQUET-1903). Please see the [migration documentation](https://issues.apache.org/jira/browse/PARQUET-2502) for further details.*}