Quick change to the access Modifiers for fields in Worker,Task and Assignmentmanager, refactored tests to use getWorkerMap

src/main/java/hhn/temp/project/Worker.java

@@ -1,8 +1,8 @@
 package hhn.temp.project;
 
 public class Worker {
-    String name;
-    int workerId;
+    private String name;
+    private int workerId;
     public Worker(String name, int workerId) {
         this.name = name;
         this.workerId = workerId;