This was missed during recent updates; this UserList needs to be on
all servers to allow bos, vos and backup commands.
Update the documentation to reflect the centralised copy.
Change-Id: I8ada3d5035bb7ef77b19ce6aaffb48335974a124
Move common setup steps into a openafs-server-config role, and create
openafs-file-server and openafs-db-server roles to manage fileserver
and db servers respectively.
Modify the playbook to run these roles against the AFS servers.
Change-Id: I4e80ad8ffe1d4992e405ea516b8762109758d7eb