ParquetThriftOutputFormat does not store any optional primitive values in parquet file

As per title, I created a simple record with thrift IDL and used the ParquetThriftOutputFormat. 

The library would not write any of the optional primitive even if set, it would write only if they are specified as required. 

parquet-mr: 1.11.1

thrift 0.13.0

**Reporter**: [Daniel Morales](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=tenentedan9)

_{**Note**: *This issue was originally created as [PARQUET-1955](https://issues.apache.org/jira/browse/PARQUET-1955). Please see the [migration documentation](https://issues.apache.org/jira/browse/PARQUET-2502) for further details.*}

Start by reproducing the issue with ParquetThriftOutputFormat using a Thrift record containing optional primitive fields, comparing optional and required fields in the resulting Parquet file. Done means set optional primitive values are written and can be read back rather than being omitted.

Written by the indexing model from the issue text.