Modify grep rule to identify 'Clone Set' resources

Current filter rule gets wrong results in transient condition.
This commit changes the grep filter rule to increase the robustness of
the result.

Closes-Bug: #1839910

Change-Id: I92aba5bc7eb9e8a90d6a2c321b3a2a20414f1779

roles/instance-ha/tasks/undo.yml

@@ -18,7 +18,7 @@
 
     - name: Remove resources associated to remote nodes
       shell: |
-        for resourceid in $(pcs resource show | grep compute | grep -v -e Stopped: -e Started: -e disabled -e remote | awk '{print $3}')
+        for resourceid in $(pcs resource show | grep compute | grep 'Clone Set:' | awk '{print $3}')
          do
           pcs resource cleanup $resourceid
           pcs --force resource delete $resourceid