pytest: Add a timeout to check-self

Author: cdecker

.github/workflows/check-self.yml

@@ -25,7 +25,7 @@ jobs:
 
     - name: Check Self
       run : |
-        make docker-check-self
+        PYTEST_OPTS='-n 2 --timeout=300' make docker-check-self
 
     - name: Run python image
       run : |