DEV-30004 adds refund v2 and threeds auth v2 response signature

src/test/java/com/iyzipay/functional/RefundTest.java

@@ -11,7 +11,7 @@
 
 import static org.junit.Assert.*;
 
-public class RefundTest extends IyziupBaseTest {
+public class RefundTest extends StandardBaseTest {
 
     @Test
     public void should_refund_payment() {

src/test/java/com/iyzipay/functional/StandardBaseTest.java

@@ -0,0 +1,17 @@
+package com.iyzipay.functional;
+
+import com.iyzipay.Options;
+import org.junit.Before;
+
+public abstract class StandardBaseTest {
+
+    Options options;
+
+    @Before
+    public void setUp() {
+        options = new Options();
+        options.setApiKey("sandbox-qBDJ5ttcxbXNNzLZ02WmkiKtHH3ADONj");
+        options.setSecretKey("sandbox-HfB5nGM5CRAGdtAijxZ8xHlqYkvN1B0p");
+        options.setBaseUrl("https://sandbox-api.iyzipay.com");
+    }
+}