dependencies: #2449 bump maven-checkstyle-plugin from 3.1.0 to 3.2.0 + resolve chec… (#2464)

* #2449 bump maven-checkstyle-plugin from 3.1.0 to 3.2.0 + resolve checkstyle issues

* remove FileSelectorJFrame.java to resolve checkstyle issue

* remove FileSelectorJFrame.java to resolve checkstyle issue

* remove FileSelectorJFrame.java to resolve checkstyle issue

* add refactored file with correct filename to resolve checkstyle issue

* add the test data

* change filenames from JFrame to Jframe for checkstyle

* fix code smell from  sonar report

* add new testcases to improve the test coverage

* remove code smell

fanout-fanin/src/main/java/com/iluwatar/fanout/fanin/App.java

@@ -26,7 +26,6 @@ package com.iluwatar.fanout.fanin;
 
 import java.util.Arrays;
 import java.util.List;
-
 import lombok.extern.slf4j.Slf4j;
 
 

fanout-fanin/src/main/java/com/iluwatar/fanout/fanin/Consumer.java

@@ -25,7 +25,6 @@
 package com.iluwatar.fanout.fanin;
 
 import java.util.concurrent.atomic.AtomicLong;
-
 import lombok.Getter;
 
 

fanout-fanin/src/main/java/com/iluwatar/fanout/fanin/SquareNumberRequest.java

@@ -25,7 +25,6 @@
 package com.iluwatar.fanout.fanin;
 
 import java.security.SecureRandom;
-
 import lombok.AllArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 

fanout-fanin/src/test/java/com/iluwatar/fanout/fanin/FanOutFanInTest.java

@@ -26,7 +26,6 @@ package com.iluwatar.fanout.fanin;
 
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Test;
-
 import java.util.Arrays;
 import java.util.List;