avoid the two steps running at the same.

This is me trying to figure out what's going on with the test failures :).

.gitlab-ci.yml

 image: python:latest
 stages:
+  - validate
   - test
 
 before_script:
   - python -V
 
 check:
-  stage: test
+  stage: validate
   script:
-  - pip install flake8
-  - flake8 karma.py --max-line-length 120
+    - pip install flake8
+    - flake8 karma.py --max-line-length 120
 
-test:
+pytest:
   stage: test
   script:
-  - pip install errbot pytest
-  - pytest
+    - pip install errbot pytest
+    - pytest