cubicweb-tracker #3766735 Project.rest_attr should be forced to name [validation pending]

to avoid surprises if client cubes add new attributes. using another attribute for rest path would break the urls for versions

prioritynormal
typebug
done in1.15.3
load0.500
load left0.000
closed by#f811d33391d9 [entities] Add 'rest_attr' on Project entity (closes #3766735)
patch[entities] Add 'rest_attr' on Project entity (closes #3766735) [applied]