dns: fix test/pummel/test-net-pingpong.js

PR-URL: #39987
Fixes: #31566
Refs: #6307
Refs: #20710
Refs: #38099
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Michael Dawson <midawson@redhat.com>

Author: treysis

test/pummel/test-net-pingpong.js

@@ -112,7 +112,8 @@ function pingPongTest(host, on_complete) {
 
 // All are run at once and will run on different ports.
 pingPongTest(null);
-if (common.hasIPv6) pingPongTest('::1'); else pingPongTest('127.0.0.1');
+pingPongTest('127.0.0.1');
+if (common.hasIPv6) pingPongTest('::1');
 
 process.on('exit', function() {
   assert.strictEqual(tests_run, common.hasIPv6 ? 3 : 2);