Add view tests

• Introduce framework to simply test correct rendering of views
• Create tests for dashboard views
• Create tests for plan views
• Create tests for default admin views (add and change) of AKModel models
• Create tests for scheduling (admin) views
• Create tests for submission views
• Improve pipeline to correctly run the new tests on a blank database with fixture loading
• Add coverage reporting
• Show test results in GitLab directly

.gitlab-ci.yml

@@ -37,6 +37,8 @@ test:
     - echo "GRANT ALL on *.* to '${MYSQL_USER}';"| mysql -u root --password="${MYSQL_ROOT_PASSWORD}" -h mysql
     - pip install pytest-cov unittest-xml-reporting
     - coverage run --source='.' manage.py test --settings AKPlanning.settings_ci
+  after_script:
+    - source venv/bin/activate
     - coverage report
     - coverage xml
   coverage: '/(?i)total.*? (100(?:\.0+)?\%|[1-9]?\d(?:\.\d+)?\%)$/'