L2SS-947: Ignore pull failure for image builds

sbin/tag_and_push_docker_image.sh

@@ -161,9 +161,9 @@ if [ ! -z "${1+x}" ] && [ "${1}" != "pull" ]; then
       local_url="${LOCAL_DOCKER_REGISTRY_HOST}/${LOCAL_DOCKER_REGISTRY_USER}/${2}"
 
       # If tag is not latest, than it is not a tagged master build and we can
-      # pull the latest image as cache.
+      # pull the latest image as cache (if it already exists).
       if [ "${tag}" != "latest" ]; then
-        docker pull "${local_url}:latest"
+        docker pull "${local_url}:latest" || true
       fi
 
       make build "${1}"