cubicweb #343542 pyro access is broken [rejected]

ex. trace :

>>> from cubicweb.dbapi import connect
>>> cnx = connect(user='admin', password='admin', database='mybase')
>>> cur = cnx.cursor()
>>> rset = cur.execute('VersionedFile VF')
>>> rset.get_entity(0,0)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/auc/src/public/logilab/common/decorators.py", line 65, in cache_wrapper3
    _cache[args] = callableobj(self, *args)
  File "/home/auc/src/cubicweb/cubicweb/rset.py", line 346, in get_entity
    return self._build_entity(row, col)
  File "/home/auc/src/cubicweb/cubicweb/rset.py", line 383, in _build_entity
    entity = self.vreg.etype_class(etype)(req, self, row, col)
  File "/home/auc/src/cubicweb/cubicweb/cwvreg.py", line 377, in etype_class
    usercls = super(MulCnxCubicWebRegistry, self).etype_class(etype)
  File "/home/auc/src/public/logilab/common/decorators.py", line 65, in cache_wrapper3
    _cache[args] = callableobj(self, *args)
  File "/home/auc/src/cubicweb/cubicweb/cwvreg.py", line 178, in etype_class
    cls = self.select(self.registry_objects('etypes', btype), etype)
  File "/home/auc/src/cubicweb/cubicweb/vregistry.py", line 169, in registry_objects
    registry = self.registry(name)
  File "/home/auc/src/cubicweb/cubicweb/vregistry.py", line 161, in registry
    return self._registries[name]
 cubicweb._exceptions.RegistryNotFound: etypes
priorityminor
typebug
done in<not specified>
load left0.000
closed by<not specified>