fix(Creating Classes #2 Tests ): Updated tests to handle large numbers

Replaced toIntOrNull() with toLongOrNull() in the test to prevent
failure on large numbers

Closes https://youtrack.jetbrains.com/issue/EDC-449

Introduction to Objects/Creating Classes/Exercise 2/test/Tests.kt

@@ -23,6 +23,6 @@ class TestCreatingClassesExercise2 {
     val message = "The 'displayID' function should display the address of the object, " +
       "something like '30c7da1e'\n" +
       "was: $output"
-    Assert.assertTrue(message, output.trim().toIntOrNull(16) != null)
+    Assert.assertTrue(message, output.trim().toLongOrNull(16) != null)
   }
 }