https://issues.apache.org/jira/browse/KAFKA-4025
this patch sets the file.encoding system property to UTF-8 before invoking rat during the build process and resets it to the original value afterwards
Author: radai-rosenblatt <radai.rosenblatt@gmail.com>
Reviewers: Joel Koshy <jjkoshy.w@gmail.com>
Closes#1710 from radai-rosenblatt/fix-build-on-windows