fix memcache config

@@ -13,7 +13,7 @@ const bodyParser = require('body-parser');
 const cookieParser = require('cookie-parser');
 const favicon = require('serve-favicon');
 const yohoLib = require('yoho-node-lib');
-const session = require('express-session');
+const session = require('yoho-express-session');
 const memcached = require('connect-memcached');
 const hbs = require('express-handlebars');
 const pkg = require('./package.json');
@@ -65,7 +65,7 @@ app.use(session({
     store: new MemcachedStore({
         hosts: config.memcache.session,
         prefix: 'yohobuy_session:',
-        timeout: 100,
+        timeout: 1000,
         retries: 0
     })
 }));