This is to enable the `rook` ceph-mgr module to drive
the Rook and k8s APIs, exposing functionality via
its own CLI and GUI.
The service account gets access to two different roles:
one for the items that are within the cluster's namespace,
and one for reading configmaps in the rook-ceph-system namespace,
which is needed for reporting available devices.
Signed-off-by: John Spray <john.spray@redhat.com>