[server] Use dict.setdefault() instead of if/else in repo.glob_add_relations()

[cleanup] Fix some flake8 errors

[test] Stop using lgc.testlib in unittest_migractions

[test] Drop no more used "maxeid" based deletion in BaseQuerierTC and derived tests This is probably only necessary for QuerierTC itself, move it there and drop incantation from other derived classes to deactivate this feature.

[rql2sql/test] Remove dead setUpModule tearDownModule they are overwritten a few lines below , hence this code is dead and not necessary for test success, drop it.

[rql2sql/test] Move base class from repotest to unittest_rql2sql It's only used there, so move it closer to its usage. Along the way, stop using lgc.testlib.

[rql2sql/test] Set maxDiff to None to see full diffs this is usually useful to compare SQL strings

[rql2sql] Use string_type instead of unicode for py3k support

[gcdebug] Only ignore weakref.WeakKeyDictionary class on Python 2 From Python 3.5, this class fails isinstance check with the following error: :: cls = <class 'weakref.WeakKeyDictionary'>, instance = <functools._lru_list_elem object at 0x7f4331859a48> def __instancecheck__(cls, instance): """Override for isinstance(instance, cls).""" # Inline the cache checking > subclass = instance.__class__ E AssertionError: [<class 'AttributeError'> in gc] 'functools._lru_list_elem' object has no attribute '__class__' /usr/lib/python3.5/abc.py:181: AssertionError I have no clue why this happens, but it makes cubicweb.web.test.test_views.AutomaticWebTest.test_startup_views fail on Python 3.5. So only consider this class for Python 2.

[wsgi] Convert "code" passed to WSGIResponse as integer WSGIResponse is passed a Request.status_out in CubicWebWSGIApplication._render(), which, starting from Python 3.5, is an instance of HTTPStatus. However, webtest still expects a 3-digits value as status string. Fortunately, calling int() on an HTTPStatus works.