Specify the RBAC requirements for --all-namespaces (#927)
Specify the RBAC requirements for --all-namespaces (#927)

Signed-off-by: Simon Plourde <e9ac3b5b76975b6864f2847308b225f77734cb64@gmail.com>

sensu/sensu-docs,sensu/sensu-docs,sensu/sensu-docs,sensu/sensu-docs,sensu/sensu-docs