improveworsening service detections

roles/upgrade/tasks/main.yml

@@ -7,16 +7,17 @@
   
 - name: remove conflicting packages if kernel is going to changed
   block:
-    - name: see if we have a lustre-client service
+    - name: see if we have a lustre-client service or not
       shell: systemctl status lustre-client
       register: lustreStatus
       changed_when: False
-      failed_when: '"could not be found" in lustreStatus.stdout'
-
+      failed_when: '"could not" in lustreStatus.stderr'
+      ignore_errors: yes
+      
     - name: stop lustre
       service: name=lustre-client state=stopped
       become: true
-      when: lustreStatus
+      when: not lustreStatus.failed
 
     - name: remove conflicting packages if kernel is going to changed
       package: