pythonPackages.z3c-checkversions: disable python2 tests

the zope namespace will cause collisions for python2

Changed files
+1
pkgs
development
python-modules
z3c-checkversions
+1
pkgs/development/python-modules/z3c-checkversions/default.nix
···
propagatedBuildInputs = [ zc_buildout ];
checkInputs = [ zope_testrunner ];
+
doCheck = !python.pkgs.isPy27;
checkPhase = ''
${python.interpreter} -m zope.testrunner --test-path=src []
'';