parquet-thrift converts Thrift i16 to parquet INT32 instead of INT_16

Currently when converting Thrift to Parquet, the ThriftSchemaConverter will convert a i16 thrift data type as a INT32 Parquet data type even if the logical type INT(16, false) would be more representative, especially for downstream consumers of the parquet files.

Using the logical data type requires a change in this method:

 @Override
  public ConvertedField visit(I16Type i16Type, State state) {
    return visitPrimitiveType(INT32, state);
  }

from the ThriftSchemaConvertVisitor