[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-cli/pom.xml

@@ -29,6 +29,7 @@
   <properties>
     <spring.shell.version>1.2.0.RELEASE</spring.shell.version>
     <jar.mainclass>org.springframework.shell.Bootstrap</jar.mainclass>
+    <main.basedir>${project.parent.basedir}</main.basedir>
   </properties>
 
   <repositories>