8022212: Intermittent test failures in java/net

Reviewed-by: chegar

test/java/net/NetworkInterface/IndexTest.java

@@ -33,11 +33,16 @@ import java.util.Enumeration;
 import static java.lang.System.out;
 
 public class IndexTest {
+    static final boolean isWindows = System.getProperty("os.name").startsWith("Windows");
+
     public static void main(String[] args) throws Exception {
         Enumeration<NetworkInterface> netifs = NetworkInterface.getNetworkInterfaces();
-        NetworkInterface nif = null;
+        NetworkInterface nif;
         while (netifs.hasMoreElements()) {
             nif = netifs.nextElement();
+            // JDK-8022212, Skip (Windows) Teredo Tunneling seudo-Interface
+            if (nif.getDisplayName().contains("Teredo") && isWindows)
+                continue;
             int index = nif.getIndex();
             if (index >= 0) {
                 NetworkInterface nif2 = NetworkInterface.getByIndex(index);