Revert "Update .gitlab-ci.yml"

This reverts commit d68b001f.

.gitlab-ci.yml

@@ -41,7 +41,7 @@ django tests and coverage:
     - pip install -U poetry black
     - poetry install
     - poetry run doit migrate
-    - poetry run ./manage.py check --failfast
+    - poetry run ./manage.py check
 #    - poetry run ./manage.py test
 #  coverage: /^TOTAL.*\s+(\d+\%)$/