Bug fix: support kilo's keystone requirement for domain-name, extracts from ENV var

roles/kubernetes/preinstall/defaults/main.yml

@@ -25,6 +25,7 @@ openstack_username: "{{ lookup('env','OS_USERNAME')  }}"
 openstack_password: "{{ lookup('env','OS_PASSWORD')  }}"
 openstack_region: "{{ lookup('env','OS_REGION_NAME')  }}"
 openstack_tenant_id: "{{ lookup('env','OS_TENANT_ID')  }}"
+openstack_domain_name: "{{ lookup('env','OS_USER_DOMAIN_NAME')  }}"
 
 # All clients access each node individually, instead of using a load balancer.
 etcd_multiaccess: true

roles/kubernetes/preinstall/templates/openstack-cloud-config.j2

@@ -4,3 +4,4 @@ username={{ openstack_username }}
 password={{ openstack_password }}
 region={{ openstack_region }}
 tenant-id={{ openstack_tenant_id }}
+domain-name={{ openstack_domain_name }}