Verify that appuio_pruner_disabled_jobs only contains valid jobs

tasks/pruner-present.yml

@@ -23,11 +23,14 @@
         arguments:
           NAMESPACE: "{{ appuio_pruner_namespace }}"
 
+    - name: Validate appuio_pruner_disabled_jobs
+      with_list: "{{ appuio_pruner_disabled_jobs }}"
+      assert:
+        that:  item in appuio_pruner_jobs
+        msg: "'{{ item }}' is not a valid job. Valid jobs are '{{ appuio_pruner_jobs | join(', ') }}'."
+
     - name: Install cronjobs
-      with_list:
-        - builds
-        - deployments
-        - images
+      with_list: "{{ appuio_pruner_jobs }}"
       when: item not in appuio_pruner_disabled_jobs
       vars:
         cmd: >-
@@ -58,7 +61,8 @@
         delete cronjob "prune-{{ item }}"
       register: r_remove_cronjob
       changed_when: r_remove_cronjob.rc == 0
-
+  vars:
+    appuio_pruner_jobs: [builds, deployments, images]
   always:
     - name: Delete temp directory
       file: