This MR adds 2 things to facilitate tests in CI with plugin credentials
- a
citest flag. Cells marked with#ciwill only be executed in ci (or when callingnbdev_test_nbs --flags ci -
pymemri.test_utils.get_ci_variables, get given variables from environment and returns them as dict. - plugin credentials can be added by repo admins in settings - CI/CD - Variables. I've added two test variables in this repo as example.