cubicweb-collaboration #3670561 The `collaborates_on` delete permissions cannot use the `owners` virtual group [validation pending]

This is so, because the 'owners' group can only be used on entity types, not on relation definitions (see also http://docs.cubicweb.org/devrepo/datamodel/definition.html#the-standard-user-groups).

prioritynormal
typebug
done in0.2.0
load0.100
load left0.000
closed by#21bea1b9aa97 [init, hooks] Fix default collaborates_on handling and permissions (closes #3670561)
patch[init, hooks] Fix default collaborates_on handling and permissions (closes #3670561) [applied]