[TOOLS][TESTS] Add a data fixture with example notes, for testing

src/DataFixtures/NoteFixtures.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace App\DataFixtures;
+
+use App\Entity\Note;
+use Doctrine\Bundle\FixturesBundle\Fixture;
+use Doctrine\Persistence\ObjectManager;
+
+class NoteFixtures extends Fixture
+{
+    public function load(ObjectManager $manager)
+    {
+        $manager->persist(Note::create(['gsactor_id' => 1, 'content' => 'some content']));
+        $manager->flush();
+    }
+}