[web/application] remove `path` argument from CubicwebPublisher methods Path can actually be accessed from `req` object. This allows to avoid duplicating this information. This cset prepares the next ones that aim at adding the language as a prefix of the relative path.

usr/bin/cubicweb-ctl usr/bin/
usr/lib/python2*/*-packages/cubicweb/cwctl.py
../cubicweb-ctl.bash_completion etc/bash_completion.d/cubicweb-ctl