Testing a push with subrepos

On the server side, subrepos should be essentially ignored, at
least for a push. Since we're in the process of adding server-side
protections to avoid cloning all subrepos targets and performing
dangerous commits, it felt necessary to check that basic operation
is still working.
2 jobs for topic/default/subrepos in 27 minutes and 47 seconds (queued for 1 second)