[devtool-testlib] add deprecated entry point for publish method
6c2119509fac renamed ``publish`` to ``handle_request``. And removed the older testlib
function (because the semantic of handle_request is quite different from the
publish one). However it seems to do more harm that good and I'm adding proxy with
deprecation warning for those.
debian/tmp/usr/lib/PY_VERSION/site-packages/cubicweb/web usr/lib/PY_VERSION/site-packages/cubicweb
debian/tmp/usr/share/cubicweb/cubes/shared/data usr/share/cubicweb/cubes/shared
debian/tmp/usr/share/cubicweb/cubes/shared/wdoc usr/share/cubicweb/cubes/shared