ci(tests): force cucumber tests to exec sequentially

.gitlab-ci.yml

@@ -118,8 +118,9 @@ tests_debug:
     DUNITER_INTEGRATION_TESTS_SPAWN_NODE_DURATION: "20"
   script:
     - cargo test --workspace --exclude duniter-integration-tests
+    - cargo cucumber -i balance*
     - cargo cucumber -i monetary*
-    - cargo cucumber -i *transfer*
+    - cargo cucumber -i transfer*
   dependencies:
     - build_debug