Add missing copyright headers

Autoported commit.
Original commit hash: [608d087fd]

Author: iText-CI

itext.tests/itext.commons.tests/itext/commons/utils/DateTimeUtilTest.cs

@@ -27,8 +27,8 @@ namespace iText.Commons.Utils {
     public class DateTimeUtilTest : ExtendedITextTest {
         [NUnit.Framework.Test]
         public virtual void GetCurrentTest() {
-            DateTime date = new DateTime();
-            NUnit.Framework.Assert.AreEqual(date.ToString(), DateTimeUtil.GetCurrentUtcTime().ToString());
+            DateTime date = DateTime.Now;
+            NUnit.Framework.Assert.AreEqual(date.ToString(), DateTimeUtil.GetCurrentTime().ToString());
         }
 
         [NUnit.Framework.Test]

itext/itext.commons/itext/commons/actions/data/CommonsProductData.cs

@@ -1,3 +1,25 @@
+/*
+This file is part of the iText (R) project.
+Copyright (c) 1998-2021 iText Group NV
+Authors: iText Software.
+
+This program is offered under a commercial and under the AGPL license.
+For commercial licensing, contact us at https://itextpdf.com/sales.  For AGPL licensing, see below.
+
+AGPL licensing:
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public License
+along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
 using System;
 
 namespace iText.Commons.Actions.Data {