Set change url to gitweb URL.

So that status pages can easily link to gitweb urls of ref-update
triggered changes.

Change-Id: Id9b708a473d92c30727f66578a0174f18c657723
Reviewed-on: https://review.openstack.org/18602
Approved: Jeremy Stanley <fungi@yuggoth.org>
Reviewed-by: Jeremy Stanley <fungi@yuggoth.org>
Tested-by: Jenkins
2 files changed