Delta Encoding is not used when dictionary enabled

Current code doesn't enable using both Delta Encoding and Dictionary Encoding. If I instantiate ParquetWriter like this :
```Java
val writer = new ParquetWriter[Group](outFile, new GroupWriteSupport, codec, blockSize, pageSize, dictPageSize, enableDictionary = true, true, ParquetProperties.WriterVersion.PARQUET_2_0, configuration)
```

Then this piece of code :
https://github.com/apache/parquet-mr/blob/master/parquet-column/src/main/java/org/apache/parquet/column/values/factory/DefaultValuesWriterFactory.java#L78-L86

Causes that DictionaryValuesWriter is used instead of the inferred DeltaLongEncodingWriter.

The original issue is here : https://github.com/apache/parquet-mr/pull/154#issuecomment-266489768

**Reporter**: [Jakub Liska](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=l154k)

_{**Note**: *This issue was originally created as [PARQUET-796](https://issues.apache.org/jira/browse/PARQUET-796). Please see the [migration documentation](https://issues.apache.org/jira/browse/PARQUET-2502) for further details.*}

Bắt đầu trong parquet-column/src/main/java/org/apache/parquet/column/values/factory/DefaultValuesWriterFactory.java tại các dòng 78-86, sau đó truy vết cách DictionaryValuesWriter được chọn thay cho DeltaLongEncodingWriter được suy luận. Tái hiện cấu hình ParquetWriter từ issue và bổ sung coverage cho thấy hành vi encoding mong đợi khi dictionary encoding được bật.

Do mô hình lập chỉ mục viết ra từ nội dung của issue.