[parquet-mr] Implement specification-compliant floating point comparison

Currently, the floating point comparison order defined by parquet-format is ambigous and different implementations use different orderings. Once the specification is made unambigous (PARQUET-1222), implementations should be updated to conform to it.

**Reporter**: [Zoltan Ivanfi](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=zi) / @zivanfi
#### Related issues:
- [Specify a well-defined sorting order for float and double types](https://github.com/apache/parquet-format/issues/342) (is blocked by)

_{**Note**: *This issue was originally created as [PARQUET-1223](https://issues.apache.org/jira/browse/PARQUET-1223). Please see the [migration documentation](https://issues.apache.org/jira/browse/PARQUET-2502) for further details.*}

La issue non indica file, test o punti di ingresso in parquet-java. Inizia leggendo la issue bloccata PARQUET-1222, «Specify a well-defined sorting order for float and double types», quindi individua l’implementazione del confronto e i relativi test; il lavoro è completato quando parquet-java è conforme alla specifica finalizzata.

Scritto dal modello di indicizzazione a partire dal testo della issue.