osd: update the check for 'all osd to be up'
osd: update the check for 'all osd to be up'

the data structure has changed in octopus.
eg: the path to `num_osds` is now `["osdmap"]["num_osds"]`.

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

ceph/ceph-ansible,ceph/ceph-ansible