Fix cephadm image tag conditional error

[Alex-Welsh]

This change allows the pulp container/repo playbooks for syncing and publishing to be configured using ansible facts.

Recent changes use facts to set the Ceph images, which therefore fails.

   The conditional check 'pulp_repository_container_repos | length > 0' failed. The error was: error while evaluating conditional (pulp_repository_container_repos | length > 0): {{ stackhpc_pulp_repository_container_repos }}:{{(stackhpc_pulp_repository_container_repos_kolla + stackhpc_pulp_repository_container_repos_ceph) | selectattr('required') }}: [AnsibleMapping([('name', 'ceph/ceph'), ('url', 'https://quay.io'), ('policy', 'on_demand'), ('proxy_url', '{{ pulp_proxy_url }}'), ('state', 'present'), ('include_tags', '{{ cephadm_image_tag }}'), ('required', '{{ stackhpc_sync_ceph_images | bool }}')])]: {{'v17.2.6' if ansible_facts['distribution_release'] == 'jammy' else 'v16.2.11' }}: 'dict object' has no attribute 'distribution_release'

The alternative would be to replace the cephadm_image_tag conditional with something based on os_release

[markgoddard]

Let's instead switch to use os_distribution/os_release

[Alex-Welsh]

Untested for now

[priteau]

Please update the commit message to match the new code change.

[Alex-Welsh]

Please update the commit message to match the new code change.

Good point. Should be fixed now