test: fix flaky child-process-fork-regr-nodejsgh-2847

Windows would die with ECONNRESET most times when running
this particular test. This commit makes handling these errors
more tolerable.

PR-URL: nodejs/node#4442
Reviewed-By: Fedor Indutny <fedor.indutny@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>

test/parallel/parallel.status

@@ -7,7 +7,6 @@ prefix parallel
 [true] # This section applies to all platforms
 
 [$system==win32]
-test-child-process-fork-regr-gh-2847 : PASS,FLAKY
 test-cluster-net-send                : PASS,FLAKY
 test-cluster-shared-leak             : PASS,FLAKY
 test-debug-no-context                : PASS,FLAKY

test/parallel/test-child-process-fork-regr-gh-2847.js

@@ -18,6 +18,13 @@ if (!cluster.isMaster) {
 }
 
 var server = net.createServer(function(s) {
+  if (common.isWindows) {
+    s.on('error', function(err) {
+      // Prevent possible ECONNRESET errors from popping up
+      if (err.code !== 'ECONNRESET' || sendcount === 0)
+        throw err;
+    });
+  }
   setTimeout(function() {
     s.destroy();
   }, 100);