[core] Use DEBUG log level for RateSampler initialization

[bmurphey]

In reference to this issue.

This way these logs can be seen when debugging is turned on, but otherwise left out.

[bmurphey]

I've never used tox before, but the celery test that's failing appears to be when trying to test Celery 4.2 with Kombu 4.4. However, Celery 4.2 appears to limit Kombu to >=4.2.0,<4.4. I ran the test locally and got the same issue; then I ran virtually the same test but with Kombu 4.3:

tox -e 'celery_contrib-py27-celery42-redis320-kombu43'

That fails the tests/contrib/celery/test_autopatch.py test. So, I'm not sure what I should do at this point.

[jd]

@bmurphey This has been fixed with #858 but it's only in 0.24-dev branch. You should rebase and target this branch AFAIU.

[bmurphey]

Now it's got a tornado test failure in CI, but it works locally (in Docker) with:

tox -e 'tornado_contrib-py34-tornado45'. Unfortunately I don't have permissions (understandably) to try to re-run the test to see if it's just flaky.

[jd]

There's a sleep call in the test that fails, so you can bet it's a flaky test. I've re-ran it.

[bmurphey]

@jd It looks like the test failed again; not sure what I should do here?

[jd]

I've switched the target branch to 0.24-dev and updated this PR with the latest commits, let's see.

[bmurphey]

Looks like a flaky integration test this time 😢

[jd]

Yes that's #859 — I've reran the failed job.

[brettlangdon]

This is a very reason change. Thanks @bmurphey for this!!!

[brettlangdon]

Fixes #860