This is step 3 of DE-1824.
Also update:
* six 1.13.0 => 1.14.0
* edx-django-utils 2.0.2 => 2.0.3
* skip test that checks all model changes have migrations. (We defer
this to step 4.)
made changes to test with previous version of django-waffle
updated the query count to test
testing with version 0.13
testing with version 0.14
testing with version 0.15
added version 0.14
updated the django-waffle version to use 0.18
updated the django-waffle version to use 0.16
updated the query counts to pass tests
ran make upgrade
updated the django-waffle to support django 2.2
made changes to test with previous version of django-waffle
updated the query count to test
testing with version 0.13
testing with version 0.14
testing with version 0.15
added version 0.14
updated the django-waffle version to use 0.18
updated the django-waffle version to use 0.16
updated the query counts to pass tests
removed the pdb statements
ran make upgrade
* Added pytest-json-report plugin
- modifying app-opts in setup.cfg
- adding hook to all conftest.py files in repo
- setting report to be saved to test_root/log/warnings.json
- Writing custom logic to save json report to avoid overwrite if pytest called twice
This was created to allow us to easily parse through test warnings in jenkins
Fix the issue that was preventing us from upgrading pytest. pytest does some manipulation of test packages that prevents `pkg_resources` from loading resources from them, but used to contain a workaround for the problem. That workaround was [removed](https://github.com/pytest-dev/pytest/issues/5392) in 4.6.0 as a performance enhancement when pytest switched from `pkg_resources` to `importlib-metadata` for its own entrypoint handling. This tripped up one of our test modules which defined classes that loaded templates from inside a test package. Moving these resources to the parent package fixes the problem.
More and more, `pkg_resources` is being abandoned in favor of `importlib-metadata` and `importlib_resources` as they have a simpler design with much better performance. However, `importlib_resources` doesn't support loading files from any directory which isn't itself a Python package (and doesn't allow direct use of paths including directories within the package). Jinja2 chose a [different approach](https://github.com/pallets/jinja/pull/1082) that we may want to emulate in our resource handling.
Also fixed usage of a removed `pytest.raises()` parameter and a bug in our configuration of the `common/lib` tests that became a problem after the upgrade.
