Fixity: Add cron variables

[blossomgoyal]

Add cron variables:

archivematica_fixity_cron_minute: "0"
archivematica_fixity_cron_hour: "0"
archivematica_fixity_cron_day: "*"
archivematica_fixity_cron_month: "*/6"
archivematica_fixity_cron_weekday: "*"

Connects to archivematica/Issues#1712

[mamedin]

The vars/main.yml is not the best place to put the variables when you want to allow the change when settings in host_vars or group_vars.

See: https://docs.ansible.com/ansible/latest/playbook_guide/playbooks_variables.html#understanding-variable-precedence

I'd use defaults/main.yml instead to set the default values.

[mamedin]

As an improvement, please add the disabled option:

https://docs.ansible.com/ansible/latest/collections/ansible/builtin/cron_module.html#parameter-disabled

Set false as default value in default/main.yml.

This way we can disable the cron job from ansible.

[mamedin]

And finally about variable names, if you check the existing variables in role, they all start with archivematica_src, we have several variables for fixity in defaults/main.yml, so they should start with archivematica_src_fixity

https://github.com/artefactual-labs/ansible-archivematica-src/blob/qa/1.x/defaults/main.yml#L181C1-L189C50