Always log out of docker registry after upload

Make sure we always log out of the docker registry, as not to allow
other playbooks to use the session.

Change-Id: I65fb71884b08802b5537ecef7304129cdeb952c3
Signed-off-by: Paul Belanger <pabelanger@redhat.com>

roles/upload-docker-image/tasks/main.yaml

@@ -12,6 +12,8 @@
   command: "docker login -u {{ docker_credentials.username }} -p {{ docker_credentials.password }} {{ docker_registry }}"
   no_log: true
 
+- name: Publish docker images
+  block:
     - name: Determine if we need to use buildx
       set_fact:
         use_buildx: "{{ docker_images | selectattr('arch', 'defined') | list }}"
@@ -29,3 +31,6 @@
         loop_var: zj_image
       include_tasks: buildx.yaml
       when: use_buildx
+  always:
+    - name: Log out of registry
+      command: "docker logout {{ docker_registry }}"