don't put .. in sys.path, cause pb when all tests are executed by pytest

test/unittest_emailcites.py

 # -*- coding: utf-8 -*-
 from logilab.common.testlib import TestCase, unittest_main
 
-import sys, os.path as osp
-sys.path.insert(0, osp.join(osp.dirname(__file__), '..'))
+from cubicweb import devtools # make cube importable
 
-from emailcites import parse_body
+from cubes.email.emailcites import parse_body
 
 class ParseBodyTC(TestCase):