More Vault API Samples

- Updated Samples for Vault APIs
- Updated Payment Execute to be more verbose
- Delete Plan Sample Update
- Fixes #168

sample/vault/DeleteBankAccount.php

@@ -0,0 +1,21 @@
+<?php
+// # Delete Bank Account Sample
+// This sample code demonstrate how you can
+// delete a saved bank account
+// API used: /v1/vault/bank-accounts/{<bankAccountId>}
+// NOTE: HTTP method used here is DELETE
+
+/** @var \PayPal\Api\BankAccount $card */
+$bankAccount = require 'CreateBankAccount.php';
+
+try {
+    // ### Delete Card
+    // Lookup and delete a saved credit card.
+    // (See bootstrap.php for more on `ApiContext`)
+    $bankAccount->delete($apiContext);
+} catch (Exception $ex) {
+    ResultPrinter::printError("Delete Bank Account", "Bank Account", null, null, $ex);
+    exit(1);
+}
+
+ResultPrinter::printResult("Delete Bank Account", "Bank Account", $bankAccount->getId(), null, null);