[cwctl] on upgrade, clear instance_md5_version cache
The generate-static-datadir depends on a correct
config.instance_md5_version(), and we just invalidated it by
upgrading the instance.
.. _bwcompat_module:
:mod:`cubicweb.pyramid.bwcompat`
--------------------------------
.. automodule:: cubicweb.pyramid.bwcompat
.. autofunction:: includeme
.. autoclass:: PyramidSessionHandler
:members:
.. autoclass:: CubicWebPyramidHandler
:members:
.. automethod:: __call__
.. autoclass:: TweenHandler
:members: