Add ReadOnlyUsers group and policy
Add ReadOnlyUsers group and policy

Adding an IAM Group called ReadOnlyUsers, along with the managed
ReadOnlyAccess policy.

limed/nubis-stacks,tinnightcap/nubis-stacks,gozer/nubis-stacks,limed/nubis-stacks,gozer/nubis-stacks,Nubisproject/nubis-stacks,Nubisproject/nubis-stacks,tinnightcap/nubis-stacks