Add additional_labels parameter (#1160)

* Move label templates into `common` role

So that there is single source of labels management, and labels are
unified across the other roles

* Introduce `additional_labels`
* Fix paths for labels templates
* Return `additional_labels_items` as list
* Add molecule tests

README.md

@@ -48,6 +48,7 @@ An [Ansible AWX](https://github.com/ansible/awx) operator for Kubernetes built w
          * [Auto Upgrade](#auto-upgrade)
             * [Upgrade of instances without auto upgrade](#upgrade-of-instances-without-auto-upgrade)
          * [Service Account](#service-account)
+         * [Labeling operator managed objects](#labeling-operator-managed-objects)
       * [Uninstall](#uninstall)
       * [Upgrading](#upgrading)
          * [Backup](#backup)
@@ -1218,6 +1219,34 @@ Example configuration of environment variables
       eks.amazonaws.com/role-arn: arn:aws:iam::<ACCOUNT_ID>:role/<IAM_ROLE_NAME>
 ```
 
+#### Labeling operator managed objects
+
+In certain situations labeling of Kubernetes objects managed by the operator
+might be desired (e.g. for owner identification purposes). For that
+`additional_labels` parameter could be used
+
+| Name                        | Description                                                                              | Default |
+| --------------------------- | ---------------------------------------------------------------------------------------- | ------- |
+| additional_labels           | Additional labels defined on the resource, which should be propagated to child resources | []      |
+
+Example configuration where only `my/team` and `my/service` labels will be
+propagated to child objects (`Deployment`, `Secret`s, `ServiceAccount`, etc):
+
+```yaml
+apiVersion: awx.ansible.com/v1beta1
+kind: AWX
+metadata:
+  name: awx-demo
+  labels:
+    my/team: "foo"
+    my/service: "bar"
+    my/do-not-inherit: "yes"
+spec:
+  additional_labels:
+  - my/team
+  - my/service
+...
+```
 
 ### Uninstall ###