Remove all orphans in the site.

def orphans(dburl, sitedir):
    """Remove all orphans in the site."""
    oldcwd = os.getcwd()
    os.chdir(sitedir)
    db = StrictRedis.from_url(dburl)
    job = get_current_job(db)
    job.meta.update({'out': '', 'return': None, 'status': None})
    job.save()
    returncode, out = orphans_single(default_exec=True)

    job.meta.update({'out': out, 'return': returncode, 'status':
                     returncode == 0})
    job.save()
    os.chdir(oldcwd)
    return returncode