added plugin screen (#671)

tests/Plugin/Fixtures/TestPlugin.php

@@ -0,0 +1,31 @@
+<?php
+
+/*
+ * This file is part of the Kimai time-tracking app.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace App\Tests\Plugin\Fixtures;
+
+use App\Plugin\PluginInterface;
+
+class TestPlugin implements PluginInterface
+{
+    /**
+     * @return string
+     */
+    public function getName()
+    {
+        return 'TestPlugin';
+    }
+
+    /**
+     * @return string
+     */
+    public function getPath()
+    {
+        return __DIR__;
+    }
+}