Added Test class to track benchmark groups

src/Models/Test.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace BitGoblin\Colossus\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+class Test extends Model {
+
+  protected $fillable = [
+    'name',
+    'description',
+  ];
+
+  public function results() {
+    return $this->hasMany(Result::class);
+  }
+
+}