Add redis password for ml2 ansible coordination

networking-ansible-ml2 added a requirement for tooz coordination
which needs a redis password.

Change-Id: Iea42f5ad4830e290277f443082eed4f9275eabaa

deployment/neutron/neutron-plugin-ml2-ansible-container-puppet.yaml

@@ -36,6 +36,10 @@ parameters:
     description: ML2 config for switches
     default: {}
     type: json
+  RedisPassword:
+    description: The password for the redis service account.
+    type: string
+    hidden: true
 
 resources:
 
@@ -58,6 +62,7 @@ outputs:
         map_merge:
           - get_attr: [NeutronMl2Base, role_data, config_settings]
           - neutron::plugins::ml2::networking_ansible::host_configs: {get_param: ML2HostConfigs}
+          - neutron_redis_password: {get_param: RedisPassword}
       service_config_settings: {}
       metadata_settings:
         get_attr: [NeutronMl2Base, role_data, metadata_settings]