[devtools/test] Skip qunit tests in case of timeout Follow-up on 87443f279b0f where other similar tests got adjusted not to fail (in particular in our CI environment).

version=3
opts=uversionmangle=s/(rc|a|b|c)/~$1/ \
https://pypi.debian.net/cubicweb/cubicweb-(.+)\.(?:zip|tgz|tbz|txz|(?:tar\.(?:gz|bz2|xz)))