chore: updated folder names to be standard

Author: jjcapparell

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

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

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

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

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

@@ -1,11 +1,9 @@
-package com.codedifferently.lesson16.LunchTest;
+package com.codedifferently.lesson16.lunch;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 import static org.junit.jupiter.api.Assertions.fail;
 
-import com.codedifferently.lesson16.Lunch.InvalidCalorieException;
-import com.codedifferently.lesson16.Lunch.Lunch;
 import java.io.ByteArrayOutputStream;
 import java.io.PrintStream;
 import java.util.ArrayList;