Fix typo in the db config

Author: jackycute

lib/models/index.js

@@ -10,7 +10,7 @@ var config = require('../config')
 var logger = require('../logger')
 
 var dbconfig = cloneDeep(config.db)
-dbconfig.logger = config.debug ? logger.info : false
+dbconfig.logging = config.debug ? logger.info : false
 
 var sequelize = null