Copied acceptance tests infrastructures from oC/core

Signed-off-by: Kiran Parajuli <kiranparajuli589@gmail.com>

tests/TestHelpers/SpaceNotFoundException.php

@@ -0,0 +1,14 @@
+<?php
+/**
+ * @author Sagar Gurung <sagar@jankatitech.com>
+ *
+ */
+namespace TestHelpers;
+use Exception;
+
+/**
+ * Class SpaceNotFoundException
+ * Exception when space id for a user is not found
+ */
+class SpaceNotFoundException extends Exception {
+}