[client-connection] remove the _srv_cnx usage
It does not do anything special now that we use explicite Connection object with
automatic cnx_set handling.
/*
* 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;
}