fix: changed name of lesson_16/Lunch folder to lunch_app for main and test folders

Author: jjcapparell

lesson_16/objects/objects_app/src/main/java/com/codedifferently/lesson16/Lunch/InvalidCalorieException.java renamed to lesson_16/objects/objects_app/src/main/java/com/codedifferently/lesson16/lunch_app/InvalidCalorieException.java

@@ -1,4 +1,4 @@
-package com.codedifferently.lesson16.lunch;
+package com.codedifferently.lesson16.lunch_app;
 
 public class InvalidCalorieException extends Exception {
   public InvalidCalorieException(String message) {

lesson_16/objects/objects_app/src/main/java/com/codedifferently/lesson16/Lunch/Lunch.java renamed to lesson_16/objects/objects_app/src/main/java/com/codedifferently/lesson16/lunch_app/Lunch.java

@@ -1,4 +1,4 @@
-package com.codedifferently.lesson16.lunch;
+package com.codedifferently.lesson16.lunch_app;
 
 import java.util.ArrayList;
 

lesson_16/objects/objects_app/src/test/java/com/codedifferently/lesson16/lunch/LunchTest.java renamed to lesson_16/objects/objects_app/src/test/java/com/codedifferently/lesson16/lunch_app/LunchTest.java

@@ -1,4 +1,4 @@
-package com.codedifferently.lesson16.lunch;
+package com.codedifferently.lesson16.lunch_app;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertTrue;