more debug for python3 version testing

Former-commit-id: 1523ecf3a4e9421cc6addf7127b703c7c891b04a

.gitlab-ci.yml

@@ -14,6 +14,7 @@ test-centos7:
   - pip3 install -r requirements.txt
   - pip3 -V  #test pip3 version
   - python3 -V # test python3 version
+  - python3 -c "import sys; print(sys.version_info);print(sys.version_info < (3, 5))" #print python version
   - python3 manage.py test
 deploy-webserver:
   stage: deploy