awx.awx.schedule: Do not fail if state is absent and unified_job_template does not exist

[jedla01]

SUMMARY

Module managing schedules does is not idempotent in case unified_job_template is provided and such unified_job_template does not exist and so schedule does not exist anymore. Module should still provide OK.

This is affecting mainly configuration as code, when switching object with state to absent. It is then not consistent to have one playbook managing creation and removal at same time.

ISSUE TYPE

• Bug, Docs Fix or other nominal change

COMPONENT NAME

• Collection - awx.awx.schedule

AWX VERSION

24.4.0

ADDITIONAL INFORMATION

Using following example for configuration as code using dispatch within infra.controller_configuration is gonna deploy it.

controller_templates:
  - name: foobar_jobtemplate
     playbook: dummy_playbook
     organization: org
     state: present
controller_schedules:
  - name: foobar_schedule
    rrule: "{{ query('awx.awx.schedule_rrule',
      'day',
      start_date='2023-01-01 03:33:00',
      timezone='America/New_York')
      }}"
    unified_job_template: foobar_jobtemplate
    organization: org
    enabled: true
    state: present

Simple changing state to absent, keeping the rest of the values intact will make it fail on schedules as job templates are removed first and schedule still refer to non-existing unified_job_template.

Error:

plugins/modules/schedule.py\", line 279, in main", "TypeError: argument of type 'NoneType' is not iterable

With proposed update it manages both states successfully (present and absent).