Fix formatting and monor cleanup

spring-data-mongodb/src/test/java/org/baeldung/mongotemplate/MongoTemplateIntegrationTest.java

@@ -36,7 +36,7 @@ public class MongoTemplateIntegrationTest {
 
     @Test
     public void whenInsertingUser_thenUserIsInserted() {
-        User user = new User();
+        final User user = new User();
         user.setName("Jon");
         mongoTemplate.insert(user);
     }
@@ -115,7 +115,7 @@ public class MongoTemplateIntegrationTest {
 
     @Test
     public void givenUserExists_whenRemovingUser_thenUserIsRemoved() {
-        User user = new User();
+        final User user = new User();
         user.setName("Benn");
         mongoTemplate.insert(user);