[migration] Skip virtual rtypes when adding relation definition through add_cube
Virtual rtypes should be skipped as they are added dynamically on loading
schema. Those are skipped by e.g. schema serialisation or add_entity_type, do
the same thing here.
:mod:`cubicweb.pyramid`
=======================
.. automodule:: cubicweb.pyramid
.. autofunction:: make_cubicweb_application
.. autofunction:: wsgi_application_from_cwconfig
.. autofunction:: wsgi_application
.. toctree::
:maxdepth: 1
:glob:
pyramid/*