[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

hudi-client/pom.xml

@@ -26,6 +26,10 @@
   <artifactId>hudi-client</artifactId>
   <packaging>jar</packaging>
 
+  <properties>
+    <main.basedir>${project.parent.basedir}</main.basedir>
+  </properties>
+
   <build>
     <plugins>
       <plugin>