[SQL][minor] Put DataTypes.java in java dir.

Author: Reynold Xin <rxin@databricks.com> Closes #4097 from rxin/javarename and squashes the following commits: c5ce96a [Reynold Xin] [SQL][minor] Put DataTypes.java in java dir.

[SQL][minor] Put DataTypes.java in java dir.
19556454 · Reynold Xin · 1a200a3e · 19556454
Commit 19556454 authored 10 years ago by Reynold Xin
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/DataTypes.java
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/types/DataTypes.java