Extend some iTextCore test classes

DEVSIX-3360

Autoported commit.
Original commit hash: [06cae6cac]

Author: Kate Ivanova

itext.tests/itext.sign.tests/itext/signatures/CertificateSupportedCriticalExtensionsTest.cs

@@ -47,10 +47,11 @@ source product.
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
+using iText.Test;
 
 namespace iText.Signatures
 {
-    class CertificateSupportedCriticalExtensionsTest
+    class CertificateSupportedCriticalExtensionsTest : ExtendedITextTest
     {
         [NUnit.Framework.Test]
         public void SupportedCriticalOIDsTest()

itext.tests/itext.sign.tests/itext/signatures/sign/CrlClientOnlineTest.cs

@@ -42,9 +42,10 @@ source product.
 */
 using System;
 using iText.Signatures;
+using iText.Test;
 
 namespace iText.Signatures.Sign {
-    public class CrlClientOnlineTest {
+    public class CrlClientOnlineTest : ExtendedITextTest {
         private static readonly String destinationFolder = NUnit.Framework.TestContext.CurrentContext.TestDirectory
              + "/test/itext/signatures/sign/";
 

port-hash

@@ -1 +1 @@
-316d2dadda62a1fb4b5a8e07bd9dc9f34c5afa65
+06cae6cac38eff8ee313064c2bdb6eeb85996d70