[entity api] unify set_attributes / set_relations into a cw_set method. Closes #2423719
Allowing similar usage as create_entity/cw_instantiate.
Update cw code base to remove deprecated calls.
/*
* cubicweb js mock for unit tests
* This module defines variables and functions used in quite a few places
* in cw js framework that can't be used or guessed without a real CW server
*/
var pageid = 'my-page-id';
function _(message) {
return message;
}