Open edX, modify lms.env.json in devstack

If, while working with devstack distribution of Open edX you have difficulties with lms.env.json and lms.auth.json content (e.g. your configurations are ignored), have a look at:

edx-platform/lms/envs/devstack.py

It contains many hardcoded overrides to values which, on production, you would have configured on the two above files.