web/application: instantiate the repository outside of CubicWebPublisher
This improves decoupling and allows ``CubicWebPublisher`` user to choose which
argument are used during ``Repository`` instantiation. In particular is allows
caller to provide a ``TaskManager``.
The `vreg` argument of publisher is made mandatory. See CubicWebPublisher
docstring for details.
Related to #2249513
from cubicweb.schemas.base import in_group, CWSourceSchemaConfig
# copy __permissions__ to avoid modifying a shared dictionary
in_group.__permissions__ = in_group.__permissions__.copy()
in_group.__permissions__['read'] = ('managers',)
cw_for_source = CWSourceSchemaConfig.get_relation('cw_for_source')
cw_for_source.__permissions__ = {'read': ('managers', 'users'),
'add': ('managers',),
'delete': ('managers',)}