Pytest is missing devsite .env file and default Open edX release

[johnbaldwin]

Issue #1 pytest failes because devsite/devsite/.env does not exist

Running pytest fails with the following:

$ pytest
/home/jbaldwin/.pyenv/versions/3.5.10/envs/figpy35/lib/python3.5/site-packages/environ/environ.py:630: UserWarning: /home/jbaldwin/work/appsembler/ws/figures/devsite/devsite/.env doesn't exist - if you're not configuring your environment separately, create one.
  "environment separately, create one." % env_file)

Tox does work. Tox calling pytest works because tox defines environment variables that the devsite settings file expects. These enviroment var

The package used is here: https://github.com/joke2k/django-environ

It is unfortunate that the package seems to not be actively maintained. However, we use it only for Figures devsite and not in production.

Issue #2: There is not a default Open edX release defined. This can be seen if one creates an empty devsite/devsite/.env file.

The .env file loads environment variables that are then read in the devsite settings.py and test_settings.py files

There are options to fix this (here are just some):

1. Improve the error message if .env is missing
2. Add a default .env file with a default Open edX release
3. For the test_settings.py, use a test.env file
4. Remove use of django-environ and implement an alternate strategy for setting environment variables
5. Dynamically create a .env file with default settings if one does not already exist

TODO: dig into the options and choose

1. Quick fix for now
2. Then long term solution

[johnbaldwin]

I believe I fixed this with #443 (it works on my computer ;))