Added use of InetAddress. Relates to github #2026

Author: dghgit

test/src/main/java/org/bouncycastle/test/est/ESTServerUtils.java

@@ -2,6 +2,7 @@
 
 import java.io.File;
 import java.io.IOException;
+import java.net.InetAddress;
 import java.net.Socket;
 import java.util.Arrays;
 import java.util.List;
@@ -94,7 +95,7 @@ public static void waitForSocket(int port)
             try
             {
                 Thread.sleep(100);
-                sock = new Socket("127.0.0.1", port);
+                sock = new Socket(InetAddress.getLoopbackAddress(), port);
                 break;
             }
             catch (Exception ex)