Make `tests/hub/datarelease/test_releasenote.py` runnable within our current testing Github Action

[erikyao]

Tests involved: https://github.com/biothings/biothings.api/blob/0.11.x/tests/hub/datarelease/test_releasenote.py. It has its own conftest.py that creates and deletes the HUB_CONFIG-related files, and it's individually runnable from its local folder. (maybe I should check my PyCharm settings on Pytest)

Error message: https://github.com/newgene/biothings.api/runs/7158195473?check_suite_focus=true

Our current Github Action that runs all the tests: https://github.com/newgene/biothings.api/blob/master/.github/workflows/run-tests.yml

Advice from Chunlei:

note that HUB_CONFIG: 'tests.test_config' line, maybe you need to add something to this file?

your tests need to be runnable at the root via pytest tests

Side Quest: to setup a standard procedure for tests involving individual config?

[newgene]

should be resolved in this merged PR: https://github.com/newgene/biothings.api/pull/42. Also this PR: https://github.com/newgene/biothings.api/pull/43 resolves a test failure in Python 3.6.

@erikyao please verify it works as expected.

[erikyao]

Fixed with commit 4bd607b58bbe3dade3fbaa135f7fd587b84d61fa