Workaround ansible host bug
Workaround ansible host bug

Ansible bug:
https://github.com/ansible/ansible/issues/16972

fails when trying to skip missing hosts in playbook

Change-Id: Id37a15ca0f358b9af039b90151f3f0e836110c4a

okolisny/InfraRed,okolisny/InfraRed,okolisny/InfraRed,redhat-openstack/infrared,redhat-openstack/infrared,redhat-openstack/infrared