serial execution

Author: asiniscalchi

.github/workflows/e2e.yml

@@ -174,7 +174,7 @@ jobs:
             -r polkadot \
             -p laos \
             -p chopsticks-configs/asset_hub.yml \
-            -p hydradx &
+            -p hydradx &&
           echo "Chopsticks started"
         working-directory: ./e2e-tests