[Java] Standardise Logger naming

As per: https://github.com/apache/arrow/pull/7100#discussion_r421884919

We use LOGGER and logger interchangeably and should choose one

**Reporter**: [Ryan Murray](https://issues.apache.org/jira/browse/ARROW-8739) / @rymurr

_{**Note**: *This issue was originally created as [ARROW-8739](https://issues.apache.org/jira/browse/ARROW-8739). Please see the [migration documentation](https://github.com/apache/arrow/issues/14542) for further details.*}

先查看所引用的 pull request 讨论，然后在 Java repository 中搜索 LOGGER 和 logger 的使用位置，以确定受影响的文件。完成的标准是项目始终一致地使用一种 logger 命名约定；issue 中未提及任何特定的测试或测试文件。

由索引模型根据 Issue 内容生成。