mon: remove key generation
mon: remove key generation

As for Nautilus, keys get automatically generated so we don't need to
create them during the initial bootstrap.
We still keep the ability to generate our how admin key though.

Signed-off-by: Sébastien Han <62d754cc350e84d3b1c32ae79f976f5348e74a40@redhat.com>

ceph/ceph-docker,ceph/ceph-docker