Retry container pull 3 times

Pulling images over internet is not considered as very stable operation
as there can be a lot of issues (DNS, HTTP rate limit, route change or
interface restart ...) This patch retries "pull" 3 times to mitigate
possible networking issues

Change-Id: I03643576c9f8444d6db36364a73bccce244c8446
Closes-Bug: 1899057

deployment/manila/manila-share-pacemaker-puppet.yaml

@@ -197,6 +197,10 @@ outputs:
                 manila_share_image_latest: *manila_share_image_pcmklatest
             - name: Pull latest manila_share images
               command: "{{container_cli}} pull {{manila_share_image}}"
+              register: result
+              retries: 3
+              delay: 3
+              until: result.rc == 0
             - name: Get previous manila_share image id
               shell: "{{container_cli}} inspect --format '{{'{{'}}.Id{{'}}'}}' {{manila_share_image_latest}}"
               register: old_manila_share_image_id