[repoapi] fold ClientConnection into Connection
Connection replaces ClientConnection everywhere.
Some notes:
* testlib: .client_cnx and .repo_cnx become aliases of .cnx (we might
not want to tell people to update their tests again for just no real
benefit, so we'll live with these aliases for a while)
* entity.as_rset must not be cached because we risk caching result
sets having a Connection object as .req (helps unittest_breadcrumbs)
* entity._cw_dont_cache_attributes loses its repo/request special
paths and only keeps its storage/bfss user (this helps
unittest_wfobjs)
* moreover, entity.cw_instantiate and .cw_set stop overriding the
attributes cache *after* the before_*_entity hooks have run, because
there is no need to (it is now actually harmful to do it and
unittest_hooks.test_html_tidy* tests remain green because of this)
* rset._build_entity sticks its .req onto the entity just fetched from
the cache, because otherwise it might carry a _cw that is a
Connection object where a Request is expected (helps
unittest_views_actions)
* we get overall better cache usages (entity caches were split over
Request + ClientConnection and Connection), hence the changes
unittest_entity and unittest_wfobjs
* void the ecache when providing the cnx to a request object
Having the entity cache pre-filled when we bind it to the request
object hurts because these entities are bound to Connection objects,
that lack e.g. `.form` or `.add_js` and crash the views subsystem.
Thus, the unittest_testlib.test_error_raised test will are kept
green.
Closes #3837233
include README
include COPYING
include COPYING.LESSER
include pylintrc
include bin/cubicweb-*
include man/cubicweb-ctl.1
include doc/*.rst
recursive-include doc/book *
recursive-include doc/tools *.py
recursive-include doc/tutorials *.rst *.py
recursive-include misc *.py *.png *.display
include web/views/*.pt
recursive-include web/data external_resources *.js *.css *.py *.png *.gif *.ico *.ttf *.svg *.woff *.eot
recursive-include web/wdoc *.rst *.png *.xml ChangeLog*
recursive-include devtools/data *.js *.css *.sh
recursive-include i18n *.pot *.po
recursive-include schemas *.py *.sql
recursive-include test/data bootstrap_cubes *.py *.sql
recursive-include entities/test/data bootstrap_cubes *.py
recursive-include sobjects/test/data bootstrap_cubes *.py
recursive-include hooks/test/data bootstrap_cubes *.py
recursive-include server/test/data bootstrap_cubes *.py source* *.conf.in *.ldif
recursive-include devtools/test/data bootstrap_cubes *.py *.txt *.js
recursive-include web/test/data bootstrap_cubes pouet.css *.py
recursive-include web/test/jstests *.js *.html *.css *.json
recursive-include web/test/windmill *.py
recursive-include skeleton *.py *.css *.js *.po compat *.in *.tmpl
prune doc/book/en/.static
prune doc/book/fr/.static
prune doc/html/_sources/
prune misc/cwfs
prune goa
prune doc/book/en/devweb/js_api
global-exclude *.pyc