test: handle IPv6 localhost issues within tests

The issue of hosts that do not resolve `localhost` to `::1` is now
handled within the tests. Remove flaky status for
test-https-connect-address-family and test-tls-connect-address-family.

PR-URL: https://github.com/nodejs/node/pull/7766
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>

test/parallel/parallel.status

@@ -12,13 +12,6 @@ test-tick-processor     : PASS,FLAKY
 [$system==linux]
 test-tick-processor           : PASS,FLAKY
 
-# Flaky until https://github.com/nodejs/build/issues/415 is resolved.
-# On some of the buildbots, AAAA queries for localhost don't resolve
-# to an address and neither do any of the alternatives from the
-# localIPv6Hosts list from test/common.js.
-test-https-connect-address-family : PASS,FLAKY
-test-tls-connect-address-family : PASS,FLAKY
-
 [$system==macos]
 
 [$system==solaris] # Also applies to SmartOS

test/parallel/test-https-connect-address-family.js

@@ -36,8 +36,13 @@ function runTest() {
 }
 
 dns.lookup('localhost', {family: 6, all: true}, (err, addresses) => {
-  if (err)
+  if (err) {
+    if (err.code === 'ENOTFOUND') {
+      common.skip('localhost does not resolve to ::1');
+      return;
+    }
     throw err;
+  }
 
   if (addresses.some((val) => val.address === '::1'))
     runTest();

test/parallel/test-tls-connect-address-family.js

@@ -35,8 +35,13 @@ function runTest() {
 }
 
 dns.lookup('localhost', {family: 6, all: true}, (err, addresses) => {
-  if (err)
+  if (err) {
+    if (err.code === 'ENOTFOUND') {
+      common.skip('localhost does not resolve to ::1');
+      return;
+    }
     throw err;
+  }
 
   if (addresses.some((val) => val.address === '::1'))
     runTest();