cubicweb-container #3603241 [clone] set standard cubicweb metadata to their new value [validation pending]

The current clone operation is a pure carbon copy of the original container.

However, standard cubicweb metadata (attributes such as creation_date, relations
such as created_by) should be updated to reflect their expected (intuitive) semantics.

Using the "fastimport" cube will provide the necessary rope.

prioritynormal
typeenhancement
done in2.7.0
load0.100
load left0.000
closed by#ad6a74916d34 Clone: use the fastimport flush controller and .insert_entities
patchClone: use the fastimport flush controller and .insert_entities [applied]