mv: moves CheckNotAllowedException to the exceptions folder

Author: AmiyahJo

lesson_17/bank/bank_app/src/main/java/com/codedifferently/lesson17/bank/exceptions/CheckNotAllowedException.java

@@ -0,0 +1,7 @@
+package com.codedifferently.lesson17.bank.exceptions;
+
+public class CheckNotAllowedException extends RuntimeException {
+    public CheckNotAllowedException(String message) {
+        super(message);
+    }
+}