Last mile for test failures

Add stubs.php to include stub classes for built-in PHP classes used
throughout the code. This will allow the testing suite to verify that a
method exists, albeit not in our codebase

setup/test/tests/stubs.php

+<?php
+
+class mysqli {
+
+    function query() {}
+    function real_escape_string() {}
+    function fetch_row() {}
+
+}
+
+class ReflectionClass {
+    function getMethods() {}
+}
+
+?>