CI: wait until server is shelved offloaded

Wait for condition when shelving is finished.

Change-Id: I7945989461c0b80adbb629da2eef1464e1ce2645

ci/roles/server_action/tasks/main.yml

@@ -460,20 +460,14 @@
   register: server
   ignore_errors: true
 
-- name: Assert shelve offload server
-  assert:
-    that:
-      - ((server is success)
-         or (server is not success
-             and "Cannot 'shelveOffload' instance" in server.msg
-             and ("while it is in vm_state shelved_offloaded" in server.msg
-             or "while it is in task_state shelving_offloading" in server.msg )))
-
 - name: Get info about server
   openstack.cloud.server_info:
     cloud: "{{ cloud }}"
     server: ansible_server
   register: servers
+  until: servers.servers.0.task_state == none
+  retries: 30
+  delay: 10
 
 - name: Ensure status for server is SHELVED_OFFLOADED
   # no change if server has been offloaded automatically after first shelve command