fix: adjusted package names in main and test folders

Author: mercedes-mathews

lesson_16/objects/objects_app/src/main/java/com/codedifferently/lesson16/strengthmachine1/MachineInUseException.java renamed to lesson_16/objects/objects_app/src/main/java/com/codedifferently/lesson16/strengthmachine/MachineInUseException.java

@@ -1,4 +1,4 @@
-package com.codedifferently.lesson16.strengthmachine1;
+package com.codedifferently.lesson16.strengthmachine;
 
 public class MachineInUseException extends RuntimeException {
   public MachineInUseException(String message) {

lesson_16/objects/objects_app/src/main/java/com/codedifferently/lesson16/strengthmachine1/StrengthMachine.java renamed to lesson_16/objects/objects_app/src/main/java/com/codedifferently/lesson16/strengthmachine/StrengthMachine.java

@@ -1,4 +1,4 @@
-package com.codedifferently.lesson16.strengthmachine1;
+package com.codedifferently.lesson16.strengthmachine;
 
 import java.util.ArrayList;
 

lesson_16/objects/objects_app/src/test/java/com/codedifferently/lesson16/strengthmachine1/StrengthMachineTest.java renamed to lesson_16/objects/objects_app/src/test/java/com/codedifferently/lesson16/strengthmachine/StrengthMachineTest.java

@@ -1,11 +1,11 @@
-package com.codedifferently.lesson16.strengthmachine1;
+package com.codedifferently.lesson16.strengthmachine;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatThrownBy;
 import static org.junit.jupiter.api.Assertions.assertFalse;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
-import com.codedifferently.lesson16.strengthmachine1.StrengthMachine.MuscleGroup;
+import com.codedifferently.lesson16.strengthmachine.StrengthMachine.MuscleGroup;
 import java.util.ArrayList;
 import java.util.Arrays;
 import org.junit.jupiter.api.BeforeEach;