[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-timeline-server-bundle/pom.xml

@@ -229,6 +229,7 @@
 
     <properties>
         <checkstyle.skip>true</checkstyle.skip>
+        <main.basedir>${project.parent.basedir}</main.basedir>
     </properties>
 
 

packaging/hudi-timeline-server-bundle/src/main/java/org/apache/hudi/timeline/server/bundle/Main.java

@@ -30,7 +30,7 @@ import org.apache.hudi.common.util.ReflectionUtils;
  */
 public class Main {
 
-    public static void main(String[] args) {
-        ReflectionUtils.getTopLevelClassesInClasspath(Main.class).forEach(System.out::println);
-    }
+  public static void main(String[] args) {
+    ReflectionUtils.getTopLevelClassesInClasspath(Main.class).forEach(System.out::println);
+  }
 }