make clean tasks work

tasks/clean.yaml

@@ -29,6 +29,7 @@
     state: stopped
     enabled: false
     scope: user
+  failed_when: false
 
 - name: disable and stop vdesk user service at display 47
   systemd:
@@ -36,6 +37,7 @@
     state: stopped
     enabled: false
     scope: user
+  failed_when: false
 
 - name: remove vdesk user service
   file: