preserve report's created_at and updated_at fields

devops-service/spec/workers/stack_bootstrap_worker_spec.rb

@@ -15,6 +15,7 @@ RSpec.describe StackBootstrapWorker, type: :worker, stubbed_connector: true do
   before do
     allow(Provider::ProviderFactory).to receive(:providers).and_return(%w(ec2))
     allow(stubbed_connector).to receive(:save_report)
+    allow(stubbed_connector).to receive(:report) { build(:report) }
     allow(stubbed_connector).to receive(:report_update)
     allow(stubbed_connector).to receive(:stack_insert)
 

devops-service/workers/worker.rb

@@ -132,7 +132,8 @@ class Worker
   end
 
   def update_report(additional_report_attrs)
-    report_attrs = additional_report_attrs.merge('_id' => jid, 'file' => @file)
+    initial_report = mongo.report(jid)
+    report_attrs = initial_report.to_mongo_hash.merge(additional_report_attrs)
     report = Devops::Model::Report.new(report_attrs)
     mongo.report_update(report)
     report