Allow ironic role to pull images

Change-Id: Ib3c71d89f8e20d58d44034a215140a35c6874a2b
Partially-Implements: blueprint pre-pull-images

ansible/roles/ironic/tasks/deploy.yml

+---
+- include: register.yml
+  when: inventory_hostname in groups['ironic-api']
+
+- include: config.yml
+  when: inventory_hostname in groups['ironic-api'] or
+        inventory_hostname in groups['ironic-conductor'] or
+        inventory_hostname in groups['ironic-discoverd'] or
+        inventory_hostname in groups['ironic-pxe']
+
+- include: bootstrap.yml
+  when: inventory_hostname in groups['ironic-api']
+
+- include: start.yml
+  when: inventory_hostname in groups['ironic-api'] or
+        inventory_hostname in groups['ironic-conductor'] or
+        inventory_hostname in groups['ironic-discoverd'] or
+        inventory_hostname in groups['ironic-pxe']

ansible/roles/ironic/tasks/main.yml

 ---
-- include: register.yml
-  when: inventory_hostname in groups['ironic-api']
-
-- include: config.yml
-  when: inventory_hostname in groups['ironic-api'] or
-        inventory_hostname in groups['ironic-conductor'] or
-        inventory_hostname in groups['ironic-discoverd'] or
-        inventory_hostname in groups['ironic-pxe']
-
-- include: bootstrap.yml
-  when: inventory_hostname in groups['ironic-api']
-
-- include: start.yml
-  when: inventory_hostname in groups['ironic-api'] or
-        inventory_hostname in groups['ironic-conductor'] or
-        inventory_hostname in groups['ironic-discoverd'] or
-        inventory_hostname in groups['ironic-pxe']
+- include: "{{ action }}.yml"

ansible/roles/ironic/tasks/pull.yml

+---
+- name: Pulling ironic-api image
+  kolla_docker:
+    action: "pull_image"
+    common_options: "{{ docker_common_options }}"
+    image: "{{ ironic_api_image_full }}"
+  when: inventory_hostname in groups['ironic-api']
+
+- name: Pulling ironic-conductor image
+  kolla_docker:
+    action: "pull_image"
+    common_options: "{{ docker_common_options }}"
+    image: "{{ ironic_conductor_image_full }}"
+  when: inventory_hostname in groups['ironic-conductor']
+
+- name: Pulling ironic-discoverd image
+  kolla_docker:
+    action: "pull_image"
+    common_options: "{{ docker_common_options }}"
+    image: "{{ ironic_discoverd_image_full }}"
+  when: inventory_hostname in groups['ironic-discoverd']
+
+- name: Pulling ironic-pxe image
+  kolla_docker:
+    action: "pull_image"
+    common_options: "{{ docker_common_options }}"
+    image: "{{ ironic_pxe_image_full }}"
+  when: inventory_hostname in groups['ironic-pxe']