Add BlockStorage and SwiftStorage nodes into hosts
Add BlockStorage and SwiftStorage nodes into hosts

With this we populate the hosts key (needed for /etc/hosts editing)
with the BlockStorage and SwiftStorage nodes too.

Change-Id: I6730ffe1e27d952d563c16a9480298fbef9f61fe

trozet/tripleo-heat-templates,bcrochet/tripleo-heat-templates,rdo-management/tripleo-heat-templates,trozet/opnfv-tht,bcrochet/tripleo-heat-templates,rdo-management/tripleo-heat-templates,dprince/tripleo-heat-templates,trozet/tripleo-heat-templates,trozet/opnfv-tht,redhat-openstack/tripleo-heat-templates,wyg3958/tripleo-heat-templates,bcrochet/tripleo-heat-templates,openstack/tripleo-heat-templates,trozet/opnfv-tht,dprince/tripleo-heat-templates,openstack/tripleo-heat-templates,wyg3958/tripleo-heat-templates,redhat-openstack/tripleo-heat-templates