push-to-intermediate-registry: look for container_images variable

When used with the container-image roles, the variable is
container_images, not docker_images.

Change-Id: I074f9523aea7d71879f722b88ff7c3e7e45fb90f

roles/push-to-intermediate-registry/README.rst

@@ -1,7 +1,8 @@
 Push artifacts to the intermediate registry
 
 This role will push any images built by
-:zuul:role:`build-docker-image` into an intermediate registry.
+:zuul:role:`build-docker-image` or :zuul:role:`build-container-image`
+into an intermediate registry.
 
 Run this in a trusted post-playbook at the end of a job after the
 image build.
@@ -73,3 +74,18 @@ registry operating for the use of Zuul, and it requires "skopeo" and
       :default: ['latest']
 
       A list of tags to be added to the image.
+
+.. zuul:rolevar:: container_images
+   :type: list
+
+   A list of images built.  Each item in the list should have:
+
+   .. zuul:rolevar:: repository
+
+      The name of the target repository for the image.
+
+   .. zuul:rolevar:: tags
+      :type: list
+      :default: ['latest']
+
+      A list of tags to be added to the image.

roles/push-to-intermediate-registry/tasks/main.yaml

@@ -1,5 +1,5 @@
 - name: Push images to intermediate registry
   when:
-    - docker_images is defined
+    - (docker_images is defined) or (container_images is defined)
     - zuul_success | default(true) | bool
   include_tasks: push.yaml

roles/push-to-intermediate-registry/tasks/push.yaml

@@ -88,7 +88,7 @@
   block:
     - name: Push image to intermediate registry
       include_tasks: push-image.yaml
-      loop: "{{ docker_images }}"
+      loop: "{{ docker_images if docker_images is defined else container_images }}"
       loop_control:
         loop_var: zj_image
   always: