Fix certain vagga in vagga in buildbot
Fix certain vagga in vagga in buildbot

Specifically this allows to map all users for root even when there is
/etc/subuid but there is no records for current user (root)

tailhook/vagga,popravich/vagga,popravich/vagga,popravich/vagga,popravich/vagga,tailhook/vagga,tailhook/vagga,tailhook/vagga