How to reproduce:
- create a group named nuxeo:dev
- start a parallel workflow on a document
- assign a task to group nuxeo:dev
The created 'routing' ACL is assigned to principal nuxeo:
<acl name="routing/193a99ed-1b59-4fe2-8e16-518e2fb83966"><entry principal="nuxeo" permission="Read" grant="true"/></acl>