ceph-facts: update external grafana fact filter
ceph-facts: update external grafana fact filter

e695efc hasn't been updated with the changes introduced in 9bb11c7 so
the ips_in_ranges filter isn't used for an external grafana instance.

Signed-off-by: Dimitri Savineau <a50a620e679eed14f4e99998b821cea8884cf228@redhat.com>

ceph/ceph-ansible,ceph/ceph-ansible