TST: Suppress http logs in tests
- [x] closes #38090
- [ ] tests added / passed
- [x] passes `black pandas`
- [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`

Confirming that this does the trick.
still there: https://travis-ci.org/github/pandas-dev/pandas/jobs/746140093 thanks @mroeschke 