Note where nova-bm-dnsmasq is obsolete.
Note where nova-bm-dnsmasq is obsolete.

Once we're fully migrated, we need to clean things up. This note
captures the non-obvious place.

Change-Id: I3b161a29d0f45359d642f6e6242ab1f11eedd8fb

radez/tripleo-image-elements,agroup/tripleo-puppet-elements,agroup/tripleo-puppet-elements,agroup/tripleo-puppet-elements,agroup/tripleo-puppet-elements,openstack/tripleo-image-elements,radez/tripleo-image-elements,rdo-management/tripleo-image-elements,openstack/tripleo-image-elements,rdo-management/tripleo-image-elements