Fix package declaration in exercise lecture 6

foreksempel/src/main/java/of6/delegation/lf/CallCenter.java

-package of6.delegation.kode;
+package of6.delegation.lf;
 
 import java.util.ArrayList;
 import java.util.List;

foreksempel/src/main/java/of6/delegation/lf/CallRecipient.java

-package of6.delegation.kode;
+package of6.delegation.lf;
 
 public interface CallRecipient {
 

foreksempel/src/main/java/of6/delegation/lf/Employee.java

-package of6.delegation.kode;
+package of6.delegation.lf;
 
 public class Employee implements CallRecipient {
 

foreksempel/src/main/java/of6/observable/lf/App.java

-package of6.observable.kode;
+package of6.observable.lf;
 
 import java.util.ArrayList;
 import java.util.List;

foreksempel/src/main/java/of6/observable/lf/AppListener.java

-package of6.observable.kode;
+package of6.observable.lf;
 
 public interface AppListener {