[entity] Add a cw_related_rqlst method returning the RQL select node of cw_related method This is useful if one wants to modify the query before execution. A bit a PEP8 style fix in tests along the way. Related to #12306543.

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#! /bin/sh -e

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if [ -x "/etc/init.d/cubicweb-ctl" ]; then

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    invoke-rc.d cubicweb-ctl restart || true

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fi

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#DEBHELPER#

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exit 0