keep the default timezone for transactions

lib/transaction-manager.js

@@ -18,7 +18,8 @@ TransactionManager.prototype.getConnectorManager = function(uuid) {
     var config = Utils._.extend({ uuid: uuid }, this.sequelize.config)
 
     if (uuid !== 'default') {
-      config.pool = { maxConnections: 1, useReplicaton: false }
+      config.pool                = { maxConnections: 0, useReplicaton: false }
+      config.keepDefaultTimezone = true
     }
 
     this.connectorManagers[uuid] = new this.ConnectorManager(this.sequelize, config)