Overcloud registration with portal fails

Hi,

I would like to register the openstack nodes using the portal when deploying with openstack-director.
I added the environment files as described in https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/10/html-single/advanced_overcloud_customization/#sect-Registering_the_Overcloud

i.e.:
parameter_defaults:
rhel_reg_auto_attach: "true"
rhel_reg_activation_key: "my-openstack"
rhel_reg_org: "1234567"
rhel_reg_pool_id: "1a85f9223e3d5e43013e3d6e8ff506fd"
rhel_reg_repos: "rhel-7-server-rpms rhel-7-server-extras-rpms rhel-7-server-rh-common-rpms rhel-ha-for-rhel-7-server-rpms rhel-7-server-openstack-10-rpms rhel-7-server-rhceph-2-osd-rpms rhel-7-server-rhceph-2-mon-rpms"
rhel_reg_method: "portal"
rhel_reg_sat_repo: ""
rhel_reg_base_url: ""
rhel_reg_environment: ""
rhel_reg_force: ""
rhel_reg_machine_name: ""
rhel_reg_password: ""
rhel_reg_release: ""
rhel_reg_sat_url: ""
rhel_reg_server_url: ""
rhel_reg_service_level: ""
rhel_reg_user: ""
rhel_reg_type: ""
rhel_reg_http_proxy_host: ""
rhel_reg_http_proxy_port: ""
rhel_reg_http_proxy_username: ""
rhel_reg_http_proxy_password: ""

But I got the following error
2017-05-04 11:36:19Z [overcloud]: CREATE_FAILED Resource CREATE failed: resources[0]: resources.Compute.Property error: resources.NodeExtraConfig.properties: Property rhel_reg_base_url not assigned

I than updated the environment file by setting
rhel_reg_base_url: "https://cdn.redhat.com"

But than I got the following error

CREATE_FAILED Resource CREATE failed: resources[0]: resources.Compute.Property error: resources.NodeExtraConfig.properties: Property rhel_reg_environment not assigned

Any idea what value I should set for rhel_reg_environment???

Furthermore according to overcloud registration document in the link above these values don't need to be set.

Samuel