add missing headers

Author: vkovec

Assets/FbxExporters/Editor/UnitTests/DefaultSelectionTest.cs

@@ -1,4 +1,11 @@
-using UnityEngine;
+// ***********************************************************************
+// Copyright (c) 2017 Unity Technologies. All rights reserved.
+//
+// Licensed under the ##LICENSENAME##.
+// See LICENSE.md file in the project root for full license information.
+// ***********************************************************************
+
+using UnityEngine;
 using UnityEditor;
 using UnityEngine.TestTools;
 using NUnit.Framework;

Assets/FbxExporters/Editor/UnitTests/ExporterTestBase.cs

@@ -1,4 +1,11 @@
-using UnityEngine;
+// ***********************************************************************
+// Copyright (c) 2017 Unity Technologies. All rights reserved.
+//
+// Licensed under the ##LICENSENAME##.
+// See LICENSE.md file in the project root for full license information.
+// ***********************************************************************
+
+using UnityEngine;
 using UnityEditor;
 using UnityEngine.TestTools;
 using NUnit.Framework;