Provide a ByteBuffer based write path

Similar to the effort to use a ByteBuffer in the read path, we should provide a path to use a ByteBuffer in the write path.

The proposed idea is to provide an allocator in the writer that is passed down to CapacityByteArrayOutputStream and is used to allocate a ByteBuffer instead of the byte array that it currently uses.

I've attached a patch based on the 1.5 release that does that. There are two implementations of the allocator - one for Heap memory and one for Direct memory. In addition, the allocator interface allows for a 'release' method so that reference counted memory allocators like Netty's ByteBuf can be used to provide an allocator.

**Reporter**: [Parth Chandra](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=parthc) / @parthchandra
#### Related issues:
- [Move off of Parquet fork](https://issues.apache.org/jira/browse/DRILL-1410) (is depended upon by)

_{**Note**: *This issue was originally created as [PARQUET-78](https://issues.apache.org/jira/browse/PARQUET-78). Please see the [migration documentation](https://issues.apache.org/jira/browse/PARQUET-2502) for further details.*}

まず、既存の ByteBuffer ベースの読み取りパスを、issue で名前が挙げられている writer および CapacityByteArrayOutputStream と比較します。提案されている allocator が heap または direct のバッファーをどのように提供し、release をどのように処理するかを追跡し、そのうえで、書き込みパスが両方の allocator 実装と参照カウント付きメモリをサポートしていることを確認します。

索引モデルが issue の本文から書いたものです。