Exchange troubled cell

Some more features for LimitPass.

.gitlab-ci.yml

@@ -11,8 +11,8 @@ variables:
 
 before_script:
   - . /duneci/bin/duneci-init-job
-  - python3 -m venv /duneci/modules/dune-pip
-  - source /duneci/modules/dune-pip/bin/activate
+    #- python3 -m venv /duneci/modules/dune-pip
+    #- source /duneci/modules/dune-pip/bin/activate
     #- pip install --upgrade pip
     #- pip install ufl numpy matplotlib mpi4py portalocker
   - duneci-install-module https://gitlab.dune-project.org/core/dune-common.git