Use config drive in the vm plugged directly to the external network

In such networks there is a problem with providing metadata service
without enabling isolated_metadata in the dhcp agent.
So easier way to make it working in all deployments is to use config
drive.
That patch is doing exactly that.

Change-Id: Icf5df07fb02e84fafb49e5c1813d1aed59a03249

tobiko/openstack/stacks/_nova.py

@@ -314,6 +314,8 @@ class ExternalServerStackFixture(ServerStackFixture):
     # external servers doesn't need floating IPs
     has_floating_ip = False
 
+    config_drive = True
+
     @property
     def floating_network(self):
         return self.network_stack.network_id

tobiko/openstack/stacks/nova/server.yaml

@@ -57,6 +57,11 @@ parameters:
     type: json
     description: Hints to create server
 
+  config_drive:
+    type: boolean
+    description: Whenever server should use config drive with metadata or not
+    default: false
+
   user_data:
     type: string
     default: ''
@@ -95,6 +100,7 @@ resources:
       networks:
         - port: {get_resource: port}
       scheduler_hints: {get_param: scheduler_hints}
+      config_drive: {get_param: config_drive}
       user_data_format: RAW
       user_data: {get_param: user_data}