Repetitive loadconstants

Summary

If we cd to contentcuration and run pytest -s (to show stdout) we see hundreds of

***** Loading Constants *****
Site: 3 constants saved (2 new)
License: 9 constants saved (9 new)
ContentKind: 7 constants saved (7 new)
FileFormat: 14 constants saved (14 new)
FormatPreset: 22 constants saved (22 new)
Language: 248 constants saved (248 new)
************ DONE. ************

Category

Select one: TEST PERF

How to reproduce

# yarn run services in one tab
# in another tab
pipenv shell
cd contentcuration
pytest -s

Potential fix

replace https://github.com/learningequality/studio/blob/develop/contentcuration/contentcuration/tests/base.py#L47-L50
and https://github.com/learningequality/studio/blob/develop/contentcuration/contentcuration/tests/base.py#L80-L82 etc

with somethin like setUpModule and tearDownModule:
https://docs.python.org/3/library/unittest.html#setupmodule-and-teardownmodule

Real-life consequences

Tests will run a little faster on devs' machines and in CI.

Start in contentcuration/contentcuration/tests/base.py, especially the setup and teardown sections linked in the issue, and reproduce the repeated output with pytest -s after starting the services. Compare module-level setup and teardown behavior, then run the test suite to confirm constants load without repetitive output and tests still pass.