Start a build when the provo mirror finished syncing
Start a build when the provo mirror finished syncing

Previously it was starting the build when there was something new
in NUE. Turns out there is a significant delay between NUE
and provo, so this was racy..

gosipyan/automation,gosipyan/automation,aspiers/automation,aspiers/automation,SUSE-Cloud/automation,SUSE-Cloud/automation,aspiers/automation,gosipyan/automation,gosipyan/automation,SUSE-Cloud/automation,aspiers/automation,SUSE-Cloud/automation