Add expressjs benchmarks similar to iris and netcore but MVC

Former-commit-id: 0f56ebf040514ee332b6b4a13ecc02ce6cd339c7

_benchmarks/expressjs-sessions/app.js

@@ -0,0 +1,26 @@
+process.env.NODE_ENV = 'production';
+
+const express = require('express');
+const app = express();
+const session = require('express-session');
+
+// Use the session middleware
+app.use(session({ secret: '.cookiesession.id', resave: true, saveUninitialized: false, cookie: { secure: true, maxAge: 60000 } }));
+
+app.get('/setget', function (req, res) {
+  req.session.key = 'value';
+
+  var value = req.session.key;
+  if (value == '') {
+    res.send('NOT_OK');
+    return;
+  }
+
+  res.send(value);
+});
+
+app.listen(5000, function () {
+  console.log(
+    'Now listening on: http://localhost:5000\nApplication started. Press CTRL+C to shut down.'
+  )
+});