mon: fix with_items being evaluated before when
mon: fix with_items being evaluated before when

Ansible evaluates the 'with_items' before the 'when' so if the inventory
does not have the group declared it'll fail. To fix this, we set an
empty array to make the with_items happy and then evaluate with the
'when'.

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

fgal/ceph-ansible,WingkaiHo/ceph-ansible,ceph/ceph-ansible,ceph/ceph-ansible,bengland2/ceph-ansible,WingkaiHo/ceph-ansible,jtaleric/ceph-ansible,WingkaiHo/ceph-ansible,font/ceph-ansible,travmi/ceph-ansible,albertomurillo/ceph-ansible,bengland2/ceph-ansible,albertomurillo/ceph-ansible,font/ceph-ansible,jtaleric/ceph-ansible,albertomurillo/ceph-ansible,fgal/ceph-ansible,travmi/ceph-ansible