slapos_cloud: Fixup tales

  It seems that was broken for quite long.

master/bt5/slapos_cloud/SkinTemplateItem/portal_skins/slapos_cloud/ComputeNode_viewCurrentUsageReport/listbox_error_reported.xml

@@ -113,7 +113,7 @@
       <dictionary>
         <item>
             <key> <string>_text</string> </key>
-            <value> <string>python: cell.getAggregateRelatedValue(portal_type="Software Instance").SoftwareInstance_hasReportedError(include_message=True, )</string> </value>
+            <value> <string>python: cell.getTextAccessStatus()[:40]</string> </value>
         </item>
       </dictionary>
     </pickle>