Update duration at the end of pipeline

CHANGELOG.md

@@ -23,6 +23,7 @@ Please view this file on the master branch, on stable branches it's out of date.
   - Add `/projects/visible` API endpoint (Ben Boeckel)
   - Fix centering of custom header logos (Ashley Dumaine)
   - Keep around commits only pipeline creation as pipeline data doesn't change over time
+  - Update duration at the end of pipeline
   - ExpireBuildArtifactsWorker query builds table without ordering enqueuing one job per build to cleanup
   - Add group level labels. (!6425)
   - Add an example for testing a phoenix application with Gitlab CI in the docs (Manthan Mallikarjun)

app/models/ci/pipeline.rb

@@ -59,9 +59,6 @@ module Ci
       before_transition any => [:success, :failed, :canceled] do |pipeline|
         pipeline.finished_at = Time.now
-      end
-
-      before_transition do |pipeline|
         pipeline.update_duration
       end