Fixed for non-null output

roles/kubernetes/preinstall/defaults/main.yml

@@ -24,7 +24,7 @@ openstack_auth_url: "{{ lookup('env','OS_AUTH_URL')  }}"
 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')|default(lookup('env','OS_PROJECT_ID'))  }}"
+openstack_tenant_id: "{{ lookup('env','OS_TENANT_ID')|default(lookup('env','OS_PROJECT_ID'),true)  }}"
 
 # All clients access each node individually, instead of using a load balancer.
 etcd_multiaccess: true