Remove prefix '_' while passing context param to templates

lib/cartodb/models/dataview/list.js

@@ -3,7 +3,7 @@ const debug = require('debug')('windshaft:dataview:list');
 
 const TYPE = 'list';
 
-const listSqlTpl = ctx => `select ${ctx._columns} from (${ctx._query}) as _cdb_list`;
+const listSqlTpl = ctx => `select ${ctx.columns} from (${ctx.query}) as _cdb_list`;
 
 /**
 {
@@ -35,8 +35,8 @@ module.exports = class List extends BaseDataview {
         }
 
         const listSql = listSqlTpl({
-            _query: this.query,
-            _columns: this.columns.join(', ')
+            query: this.query,
+            columns: this.columns.join(', ')
         });
 
         debug(listSql);