[web/test] drop dependency on third party cubes
Drop dependency on cubicweb-file, cubicweb-blog and cubicweb-tag for cubicweb/web/test
Copy required parts of cubes (schema, entities, views and hooks) into
cubicweb/web/test/data/cubicweb-<cube> that make tests pass.
version=3
opts=uversionmangle=s/(rc|a|b|c)/~$1/ \
https://pypi.debian.net/cubicweb/cubicweb-(.+)\.(?:zip|tgz|tbz|txz|(?:tar\.(?:gz|bz2|xz)))