Removed object tags from ci role server

Tag object was introduced to server role in commit c8a5be6b30 [1] to
allow skipping server tests when volumes are not available.

Whenever tag object is specified, Ansible will run those three tasks
in role server. But as our server module has not been ported to
OpenStack SDK 1.0.0 series it will fail even if someone only wants to
test our object ci role.

This patch removes all occurrences of the object tag in the ci server
role. Since it is not used anywhere in our code it will not break ci.

Ref.:
[1] c8a5be6b30

Change-Id: I222fac499c9a3cb16c4581fb4347170a4d97f833

ci/roles/server/tasks/main.yml

@@ -124,12 +124,8 @@
      terminate_volume: true
      wait: true
   register: server
-  tags:
-    - object
 
 - debug: var=server
-  tags:
-    - object
 
 - name: Delete server with volume
   openstack.cloud.server:
@@ -137,9 +133,6 @@
      state: absent
      name: "{{ server_name }}"
      wait: true
-  tags:
-    - object
-
 - name: Create a minimal server
   openstack.cloud.server:
      cloud: "{{ cloud }}"