Ceph-ansible playbook failing because ceph_release is returning "dummy" value

Issue

• ceph-ansible playbook is failing with the following message

TASK [ceph-fetch-keys : set_fact bootstrap_rbd_keyring] **************************************************************************
task path: /home/ceph-ansible/roles/ceph-fetch-keys/tasks/main.yml:17
fatal: [storage-test.redhat.com]: FAILED! => {
    "msg": "The conditional check 'ceph_release_num.{{ ceph_release }} >= ceph_release_num.luminous' failed. The error was: error while evaluating conditional (ceph_release_num.{{ ceph_release }} >= ceph_release_num.luminous): 'dict object' has no attribute 'dummy'\n\nThe error appears to have been in '/home/ceph-ansible/roles/ceph-fetch-keys/tasks/main.yml': line 17, column 3, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n\n- name: set_fact bootstrap_rbd_keyring\n  ^ here\n"