add security passport twitter

lib/models/config.js

@@ -66,6 +66,7 @@ module.exports = function(crowi) {
       'security:passport-ldap:isSameUsernameTreatedAsIdenticalUser': false,
       'security:passport-google:isEnabled' : false,
       'security:passport-github:isEnabled' : false,
+      'security:passport-twitter:isEnabled' : false,
 
       'aws:bucket'          : 'growi',
       'aws:region'          : 'ap-northeast-1',