fixed broken Sequelize usage

lib/query-interface.js

@@ -68,7 +68,7 @@ module.exports = (function() {
       var showTablesSql = self.QueryGenerator.showTablesQuery()
       self.sequelize.query(showTablesSql, null, { raw: true }).success(function(tableNames) {
         self.emit('showAllTables', null)
-        emitter.emit('success', Sequelize.Utils._.flatten(tableNames))
+        emitter.emit('success', Utils._.flatten(tableNames))
       }).error(function(err) {
         self.emit('showAllTables', err)
         emitter.emit('failure', err)