[pyramid] Use existing repo in PyramidCWTest
We thus do not make use of config_from_cwconfig() and build the configurator
instance by hand prior to include 'cubicweb.pyramid'.
.. _session_module:
:mod:`cubicweb.pyramid.session`
-------------------------------
.. automodule:: cubicweb.pyramid.session
.. autofunction:: includeme
.. autofunction:: CWSessionFactory