OpenShift 3.9 Ansible-Playbooks fails with OpenStack Cloud-Provider

Issue

• OpenShift-Installation using the Advanced installation method fails when installing on top of OpenStack (Newton Release) when enabling the cloud-provider parameters, as can be seen below.
  Without the parameters the installation works fine.
  Problem occurs on below task.

TASK [openshift_manage_node : Wait for Node Registration] **************************************************************************************************************************************************
Thursday 26 April 2018  07:41:18 +0200 (0:00:00.557)       0:15:01.519 ********
FAILED - RETRYING: Wait for Node Registration (50 retries left).
FAILED - RETRYING: Wait for Node Registration (50 retries left).
[...]

Entries in inventory file:

# Openstack Config
#
openshift_cloudprovider_kind=openstack
openshift_cloudprovider_openstack_auth_url=https://openstack.example.com:5000/v3/
openshift_cloudprovider_openstack_username="openstack-user"
openshift_cloudprovider_openstack_password="{{ openstack_password }}"
openshift_cloudprovider_openstack_domain_id=xxxxxxxxxxxxxxxxxxxxxxxx
openshift_cloudprovider_openstack_domain_name=openstack.example.com
openshift_cloudprovider_openstack_tenant_id=xxxxxxxxxxxxxxxxxxxxxxxx
openshift_cloudprovider_openstack_tenant_name=XXXXXXXX
openshift_cloudprovider_openstack_region=RegionName