Merge pull request #1646 from siyangbi/bugfix-destroy-not-use-schema

* Fix destroy function not using schema

lib/dao.js

@@ -516,7 +516,7 @@ module.exports = (function() {
           query = self.save(options)
         } else {
           var identifier = self.__options.hasPrimaryKeys ? self.primaryKeyValues : { id: self.id };
-          query = self.QueryInterface.delete(self, self.QueryInterface.QueryGenerator.addSchema(self.Model.tableName, self.Model.options.schema), identifier, options)
+          query = self.QueryInterface.delete(self, self.QueryInterface.QueryGenerator.addSchema(self.Model), identifier, options)
         }
 
         query.on('sql', function(sql) {