ceph.conf supports a comma separated list of
subnet CIDR's for the public_network and the
cluster network. ceph-ansible should support
setting up the firewall for this configuration.

Closes: https://bugzilla.redhat.com/show_bug.cgi?id=1767392
Closes: #4425
Related: #4333
https://docs.ceph.com/docs/nautilus/rados/configuration/network-config-ref/#network-config-settings



Signed-off-by: Harald Jensås <hjensas@redhat.com>
(cherry picked from commit d9422920)