[testlib] move repo and related attribute back on Instance instead of Class
The repo and cnx was hold by the TestCase class to work as a cache and avoid
recreation of the repo from scratch of each test. However since bad26a22fe29 the
caching is done by the DatabaseHandler object and it is not necessary have a
second layer of cache on the TestCase itself.
We move the repo and cnx attribute back on the TestCase instance itself and make
several class methods instance methods again.
This will helps to change dbapi access in test from dbapi to repoapi.
related to #2503918
# pylint: disable=W0614,W0401
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# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
#
# This file is part of CubicWeb.
#
# CubicWeb is free software: you can redistribute it and/or modify it under the
# terms of the GNU Lesser General Public License as published by the Free
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# any later version.
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# details.
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# You should have received a copy of the GNU Lesser General Public License along
# with CubicWeb. If not, see <http://www.gnu.org/licenses/>.
from warnings import warn
warn('moved to cubicweb.dataimport', DeprecationWarning, stacklevel=2)
from cubicweb.dataimport import *