add test code from discussion after lecture

src/encapsulationInheritancePolymorphism/Student.java

@@ -3,8 +3,16 @@ package encapsulationInheritancePolymorphism;
 public class Student {
     private String name;
     private String surname;
+    private String group;
+    private String faculty;
+
 
     public String getName() {
         return name;
     }
+
+    public void setFaculty(String faculty, String group) {
+        this.faculty = faculty;
+        this.group = group;
+    }
 }