Fix pipeline2 serialization

Author: arikmaor

lib/logic/api/pipeline2.js

@@ -4,8 +4,9 @@ const { sendHttpRequest } = require('./helper');
 const Pipeline = require('../entities/Pipeline2');
 
 const _extractFieldsForPipelineEntity = pipeline => ({
-    id: pipeline._id,
+    id: pipeline.id,
     name: pipeline.name,
+    metadata: pipeline.metadata,
     spec: pipeline.spec,
 });