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

leader-followers/src/main/java/com/iluwatar/leaderfollowers/Worker.java

@@ -27,6 +27,9 @@ package com.iluwatar.leaderfollowers;
 import lombok.EqualsAndHashCode;
 import lombok.extern.slf4j.Slf4j;
 
+/**
+ * Worker class that takes work from work center.
+ */
 @EqualsAndHashCode(onlyExplicitlyIncluded = true)
 @Slf4j
 public class Worker implements Runnable {