fix many test problems (#1677)

* fix many test problems

- adds [stoppable](https://npm.im/stoppable) to force-stop net & http
  servers
- upgrades to latest mocha
- much cleanup of servers
- some removal of useless code

Signed-off-by: Christopher Hiller <boneskull@boneskull.com>

* increase wait time to hack at race condition

* PoC with fork of stoppable

Signed-off-by: Christopher Hiller <boneskull@boneskull.com>

* fix custom stoppable url for newer npm

* make travis go faster; attempt to avoid npm troubles

* fix coveralls executable path

* add extra time for flake to trigger spec

Signed-off-by: Christopher Hiller <boneskull@boneskull.com>

test/nodes/core/io/31-tcpin_spec.js

@@ -16,6 +16,7 @@
 
 var net = require("net");
 var should = require("should");
+var stoppable = require('stoppable');
 var helper = require("../../helper.js");
 var tcpinNode = require("../../../../nodes/core/io/31-tcpin.js");
 
@@ -26,20 +27,13 @@ describe('TCP in Node', function() {
     var server_port = 9300;
     var reply_data = undefined;
 
-    before(function(done) {
-        done();
-    });
-
-    after(function() {
-    });
-
     beforeEach(function(done) {
         startServer(done);
     });
 
-    afterEach(function() {
-        stopServer();
+    afterEach(function(done) {
         helper.unload();
+        stopServer(done);
     });
 
     function sendArray(sock, array) {
@@ -55,15 +49,15 @@ describe('TCP in Node', function() {
     
     function startServer(done) {
         server_port += 1;
-        server = net.createServer(function(c) {
+        server = stoppable(net.createServer(function(c) {
             sendArray(c, reply_data);
-        }).listen(server_port, "localhost", function(err) {
+        })).listen(server_port, "localhost", function(err) {
             done(err);
         });
     }
 
-    function stopServer() {
-        server.close();
+    function stopServer(done) {
+        server.stop(done);
     }
     
     function send(wdata) {