[feature] add basic CI support
Gitlab CI support, for a py.test run inside the pipenv configuration.
xgitlab.cels.anl.gov is now deprecated. If you're a project owner and wish to continue to host this project in CELS gitlab, see https://help.cels.anl.gov/docs/migrating-from-legacy-to-gce/gitlab/ for instructions on how to have your project migrated to the new gitlab server.
This server will be retired on December 15, 2022.