RFE - Add functionality to deploy OVN with Composable roles

[pradiptapks]

We need to include OVN Network composable role functionality in infrared to deploy network node with OVN Controller adn DB service.

1. Need to create OVN topology with below interface profile.

	cat /root/.venv_infrared/infrared/plugins/openstack/defaults/topology/nodes/ovn.yml
	name: ovn
	flavor_id: m1.small
	interfaces:
	nic1:
	network: "management"
	nic2:
	network: "data"
	nic3:
	network: "external"
	external_network: management
	security_groups:` ` - general_access
	groups:
	- controller
	- openstack_nodes
	- overcloud_nodes
	- network

2. Create new OVN roles where we include required roles templates which is required for OVN test.