symmetric relations: replace bogus rql2sql translation by a hook The hook ensures X r Y => Y r X iff r is symmetric. The rql-no-hook data importer receives a small amendment but note that: * there exist no test for it * its actual semantics are undefined Hence we cannot prove this hunk breaks nothing, because we cannot prove anything. Closes #3259713.

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/*

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 * cubicweb js mock for unit tests

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 * This module defines variables and functions used in quite a few places

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 * in cw js framework that can't be used or guessed without a real CW server

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 */

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var pageid = 'my-page-id';

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function _(message) {

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    return message;

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}