mon: fetch initial keyring even when running rolling_update
mon: fetch initial keyring even when running rolling_update

otherwise, the task to copy mgr keyring fails during the rolling_update.

Signed-off-by: Guillaume Abrioux <30a9df5a0293a6108675377fa1673f7aa713f915@redhat.com>

ceph/ceph-ansible,ceph/ceph-ansible