promoter: validate docker_login

Implements workaround for docker_login bug which returns success even
when authentication fails.

ansible/ansible#32868

Includes note os we will be able to remove the workaround once we
get the ansible module fixed.

Change-Id: I875181cf6fca8ee99f822db16eae1a65cdeb74cb

ci-scripts/container-push/container-push.yml

@@ -121,6 +121,17 @@
           tags:
             - rdoproject_push
 
+        # Workaround for https://github.com/ansible/ansible/issues/32868
+        - name: Validate rdoproject registry login
+          shell: >
+            docker build -t trunk.registry.rdoproject.org/{{ rdoproject_namespace }}/nop - &&
+            docker push trunk.registry.rdoproject.org/{{ rdoproject_namespace }}/nop
+          args:
+            stdin: |
+              FROM scratch
+              CMD touch foo
+              ENTRYPOINT ""
+
         - name: Tag images to rdoproject registry with named label
           shell: >
             docker tag
@@ -148,6 +159,17 @@
           tags:
             - dockerhub_push
 
+        # Workaround for https://github.com/ansible/ansible/issues/32868
+        - name: Validate docker login
+          shell: >
+            docker build -t docker.io/{{ dockerhub_namespace }}/nop - &&
+            docker push docker.io/{{ dockerhub_namespace }}/nop
+          args:
+            stdin: |
+              FROM scratch
+              CMD touch foo
+              ENTRYPOINT ""
+
         # Nested loop order here is on purpose, so we push first all the images with the full hash, then we tag with the named label.
         - name: Tag and push images to docker hub
           docker_image: