Switches RunStyle to use "localhost" for IPv6 compat

Change-Id: I8d6e3a5d027a3ad5d6cee27a23bdfce41814228d
diff --git a/user/src/com/google/gwt/junit/RunStyle.java b/user/src/com/google/gwt/junit/RunStyle.java
index f77c6cc..e6e0739 100644
--- a/user/src/com/google/gwt/junit/RunStyle.java
+++ b/user/src/com/google/gwt/junit/RunStyle.java
@@ -18,8 +18,6 @@
 import com.google.gwt.core.ext.TreeLogger;
 import com.google.gwt.core.ext.UnableToCompleteException;
 
-import java.net.InetAddress;
-import java.net.UnknownHostException;
 import java.util.Collections;
 import java.util.Set;
 
@@ -65,11 +63,7 @@
    * @return the host name of the local system
    */
   public String getLocalHostName() {
-    try {
-      return InetAddress.getLocalHost().getHostAddress();
-    } catch (UnknownHostException e) {
-      throw new RuntimeException("Unable to determine my ip address", e);
-    }
+    return "localhost";
   }
 
   /**