cubicweb-nazcaui #4067810 Add a populate script for test [validation pending]

prioritynormal
typebug
done in0.3.0
load0.200
load left0.000
closed by#6171ace256ed [populate] Add a populate script for test, closes #4067810
patch[populate] Add a populate script for test, closes #4067810 [folded][populate] Add a populate script for test, closes #4067810 [applied]