add myself to root on labs instances

in the past i kept adding myself to projects
to debug things, using my wikitech admin powers,
once i give myself project admin i can sudo -s
on any instance

but f.e. in cases where there are issues with home
dirs / file system, the regular users can't login
but roots can, since /root is local and it is just
very useful to be able to root into any instance
without having to add yourself

Change-Id: Ibdb5f01e53f80596f40b3009cbbc6591f4c536a5
Merge "add myself to root on labs instances"