[HUDI-296] Explore use of spotless to auto fix formatting errors (#945)

- Add spotless format fixing to project
- One time reformatting for conformity
- Build fails for formatting changes and mvn spotless:apply autofixes them

packaging/hudi-hadoop-mr-bundle/pom.xml

@@ -28,6 +28,7 @@
 
   <properties>
     <checkstyle.skip>true</checkstyle.skip>
+    <main.basedir>${project.parent.basedir}</main.basedir>
   </properties>
 
   <build>