openshift-ansible: Containerized deployment fails on RPM check

Description

Play:     Ensure the requested version packages are available.
     Task:     Fail if rpm version and docker image version are different
     Message:  The task includes an option with an undefined variable. The error was: 'openshift_rpm_version' is undefined
               
               The error appears to have been in '/root/openshift-ansible/roles/openshift_version/tasks/masters_and_nodes.yml': line 7, column 5, but may
               be elsewhere in the file depending on the exact syntax problem.

Version

openshift-ansible-3.9.0-0.20.0-9-g3a7f199

Steps To Reproduce

Run ansible-playbook -v -i inventory openshift-ansible/playbooks/deploy_cluster.yml with inventory

[OSEv3:children]
masters
nodes

[OSEv3:vars]
ansible_ssh_user=root
deployment_type=origin
openshift_deployment_type=origin
openshift_clock_enabled=true
openshift_master_identity_providers=[{'name': 'allow_all_auth', 'login': 'true', 'challenge': 'true', 'kind': 'AllowAllPasswordIdentityProvider'}]
openshift_disable_check=memory_availability,disk_availability,docker_storage,package_availability,docker_image_availability
openshift_repos_enable_testing=True
openshift_image_tag=latest
containerized=true
enable_excluders=false

[masters]
<master_ip>

[etcd]
<master_ip>

[nodes]
<master_ip> openshift_node_labels="{'region': 'infra','zone': 'default'}" openshift_schedulable=true
<node_ip> openshift_node_labels="{'region': 'infra','zone': 'default'}" openshift_schedulable=true

Expected Results

I think in case of containerized deployment we need just skip Fail if rpm version and docker image version are different check because we do not really use any rpms

Observed Results

Deployment failed on error

Play:     Ensure the requested version packages are available.
     Task:     Fail if rpm version and docker image version are different
     Message:  The task includes an option with an undefined variable. The error was: 'openshift_rpm_version' is undefined
               
               The error appears to have been in '/root/openshift-ansible/roles/openshift_version/tasks/masters_and_nodes.yml': line 7, column 5, but may
               be elsewhere in the file depending on the exact syntax problem.

Additional Information

• CentOS Linux release 7.4.1708 (Core) I can overcome this problem by adding

when:
    - not openshift_is_atomic | bool
    - not openshift_is_containerized | bool

to the task roles/openshift_version/tasks/masters_and_nodes.yml I can create a PR, but first of all, I want to be sure that I did not miss some additional parameter and it is real issue.