Adding resetRequestId in ApiContext to enable multiple create calls in succession

tests/PayPal/Test/Rest/ApiContextTest.php

@@ -0,0 +1,37 @@
+<?php
+
+use PayPal\Rest\ApiContext;
+
+/**
+ * Test class for PPAPIService.
+ *
+ */
+class ApiContextTest extends PHPUnit_Framework_TestCase
+{
+
+    /**
+     * @var ApiContext
+     */
+    public $apiContext;
+
+    public function setUp()
+    {
+        $this->apiContext = new ApiContext();
+    }
+
+    public function testGetRequestId()
+    {
+        $requestId = $this->apiContext->getrequestId();
+        $this->assertNotNull($requestId);
+        $this->assertEquals($requestId, $this->apiContext->getrequestId());
+    }
+
+    public function testResetRequestId()
+    {
+        $requestId = $this->apiContext->getrequestId();
+        $newRequestId = $this->apiContext->resetRequestId();
+        $this->assertNotNull($newRequestId);
+        $this->assertNotEquals($newRequestId, $requestId);
+    }
+
+}