Using cascading delete

The OpenStack CLI supports doing cascading deletes directly so avoid a bunch of loops and delete directly.

playbooks/cloud-provider-openstack-acceptance-test-lb-octavia/post.yaml

@@ -19,18 +19,7 @@
 
           for lb_svc_uid in $ext_lb_svc_uid $int_lb_svc_uid; do
               lb_name=$(echo $lb_svc_uid | tr -d '-' | sed 's/^/a/' | cut -c -32)
-              {
-                  for pool in $(openstack loadbalancer show $lb_name -f value -c pools); do
-                      openstack loadbalancer pool delete $pool
-                      sleep 2
-                  done
-                  for listener in $(openstack loadbalancer show $lb_name -f value -c listeners); do
-                      openstack loadbalancer listener delete $listener
-                      sleep 2
-                  done
-                  openstack loadbalancer delete $lb_name
-                  sleep 2
-              } || true
+              openstack loadbalancer delete --cascade $lb_name || true
           done
         executable: /bin/bash
         chdir: '{{ k8s_os_provider_src_dir }}'