Invalid common.Build.CurrenStage and common.Build.CurrentState usage

I think we should use b.CurrentState instead of b.CurrentStage here:

• https://gitlab.com/gitlab-org/gitlab-ci-multi-runner/blob/v9.0.0/common/build.go#L265
• https://gitlab.com/gitlab-org/gitlab-ci-multi-runner/blob/v9.0.0/common/build.go#L269
• https://gitlab.com/gitlab-org/gitlab-ci-multi-runner/blob/v9.0.0/common/build.go#L273

Now stage can contain values defined for state label: canceled, timedout, terminated what can be seen here http://monitor.gitlab.net/dashboard/db/ci?panelId=6&fullscreen

/cc @ayufan

mentioned in merge request !530 (merged)

Closed by !530 (merged)

closed