Task Generate self-signed docker-registry certifcates failed

Issue

• Task Generate self-signed docker-registry certifcates failed
• Stand-alone registry deployment with inline comments in inventory file causes the following errors

fatal: [host1.example.com]: FAILED! => {"msg": "The conditional check 'docker_registry_self_signed | bool' failed. The error was:
 error while evaluating conditional (docker_registry_self_signed | bool): 'docker_registry_self_signed' is undefined\n\nThe error appears to have 
been in '/usr/share/ansible/openshift-ansible/roles/openshift_hosted/tasks/secure.yml': line 24, column 3, but may\nbe elsewhere in the file depen
ding on the exact syntax problem.\n\nThe offending line appears to be:\n\n\n- name: Generate self-signed docker-registry certificates\n  ^ here\n"
}