Use relatedImages to make disconnected deployments possible

* Add ability to pass images in from the CSV for disconnected installs

Signed-off-by: Christian M. Adams <chadams@redhat.com>

roles/backup/tasks/init.yml

@@ -63,6 +63,17 @@
   when:
     - backup_pvc == '' or backup_pvc is not defined
 
+- name: Set user provided postgres image
+  set_fact:
+    _custom_postgres_image: "{{ postgres_image }}:{{ postgres_image_version }}"
+  when:
+    - postgres_image | default([]) | length
+    - postgres_image_version is defined and postgres_image_version != ''
+
+- name: Set Postgres image URL
+  set_fact:
+    _postgres_image: "{{ _custom_postgres_image | default(lookup('env', 'RELATED_IMAGE_POSTGRES')) }}"
+
 - name: Create management pod from templated deployment config
   k8s:
     name: "{{ ansible_operator_meta.name }}-db-management"

roles/backup/templates/management-pod.yml.j2

@@ -13,7 +13,7 @@ metadata:
 spec:
   containers:
   - name: {{ ansible_operator_meta.name }}-db-management
-    image: "{{ postgres_image }}:{{ postgres_image_version }}"
+    image: "{{ _postgres_image }}"
     imagePullPolicy: Always
     command: ["sleep", "infinity"]
     volumeMounts: