Cloned from launchpad blueprint https://blueprints.launchpad.net/horizon/+spec/heat-topology-display-improvement. Description: The current heat topology display is poor because a lot of resources don't have any icons and are displayed as unknown resources. Tasks to be performed are : * Modify the openstack_dashboard/dashboards/project/stacks/mappings.py file to add the identification of the other resource types. * Create icons for the others resources types, keeping the actual style and put them in the openstack_dashboard/static/dashboard/img/ folder. Specification URL (additional information): None